= new reply since forum marked as read
I am glad you ditched that "doctor", and that all ended well! My pregnancy went smoothly from there on and my beloved baby is now 31
Mostly at home, but a couple of times at work. I used to take a lot of iron, too. 
It was news to me too at the time. Esp if your knees are the type that lock back easily you do it without thinking. I've found it pays to be conscious of the tendency and practice staying loose and shifting your weight while standing and talking. On the odd occasion where I've felt that slight fainting sensation I realize my knees are locked & I haven't blacked out completely ever since. 
It may have just been fainting -- but maybe not. Please do not self-diagnose. Let them do some tests.
I have a friend in school who was reading to her class and suddenly the words got all blurry and she felt faint. She had a mini-stroke. She is on aspirin therapy now and doing fine.
Don't take chances, OK? 
I'm glad you did see the NP. You are under a lot of stress. Please take care of yourself, OK? Your kitty needs you! Big
The flu, a bad reaction to a pain-killer (ended up in the ER that time), and vertigo.
Hope you are OK! 
For awhile, I was taking BP medicine and kept feeling like I was going to pass out. When I went to the ER, my BP was dangerously low. I was totally shocked.
Sometimes BP medicine can cause normal readings in a doctor's office, but at home the BP can be different. My doctor recommended I purchase an electronic BP cuff.
I hope things get better. I would also be devastated if I lost my husband. I wouldn't know what to do. 
It would happen pretty commonly in the Army during reviews or change of command ceremonies. You get a few thousand guys standing at attention for hours and some are going to drop from locking their knees. They always had medics with stretchers at the rear of the formations for that reason. When I was in-processing into the army the guy behind me in the shots line passed out just as I was getting my shots. All I heard was "I don't feel so..." and by the time I turned around he had hit the floor.
I hope this was just an isolated incident and nothing serious for you.
First I'll start with my brother. He fainted at work. Turns out he was extremely hypothyroid AND has some kind of heart 'issue'. We still don't know what it is, but he had an abnormal ECG and is currently undergoing continuous heart monitoring.
My SIL is a cop, and during training or any kind of ceremony that requires extended standing she always faints. Every time. She has low blood pressure generally so that's likely the issue. She says it's darn right embarrassing, she can't participate in any ceremonies because of it.
I used to get dizzy and lightheaded all the time as a teen when I would get up quickly. I had very low blood pressure at the time - so low when we were learning how to take BP in class the teacher was ready to call the hospital because mine was so low, lol. She redid it like 10 times and kept asking me if I felt OK.
The first time I actually lost consciousness, and this is so silly, is when I was getting my first tattoo. I was late for the appointment so skipped breakfast (NO one told me how big of a no-no this is). I fainted about 10 times until someone got me some juice and then I was fine. I was pretty sure it was low blood sugar.
The next few times were due to low blood sugar as well. Once I slipped on ice and fell, bending my elbow backwards on the way to a restaurant to have dinner. I hadn't eaten all day and I was certain I had broken my elbow. My now-ex took me to the hospital because I kept passing out. At the hospital I had X-rays and all was fine. The doctor said I probably whacked my head. I didn't think I had, but accepted it at the time. Then I fainted at home when I cut myself chopping up veggies for supper. Yes, I was famished then as well. Some juice and a short nap on the couch and I was fine, but it was scary because I think it was the blood that did it. Now I'm so nervous when I see blood!
I passed out after having a C-section with my last baby. I had never passed out after a C-section before, but I have a feeling the blood pressure drop from the epidural was too much for me, even though my BP was technically 'low-normal' it was so low compared to my pregnancy BP I think my body thought it was going into shock (well, and I lost quite a bit of blood compared to my other births, so that contributed).
Now, I understand you have recently lost your husband, and I read your post upthread regarding chills & hot flashes. First I will tell you that it's important to get everything checked out by a doctor (there's my disclaimer.)
I would guess that it's possible some of your symptoms are stress and grief. Sometimes you don't even realize how stressed you are. When my ex left me, I started having all kinds of panic attacks (which often don't feel like panic, you just get hot all over, or cold all over, or dizzy, or faint...or you feel like you are going to die, or your stomach starts 'sinking', or you feel like you can't breathe, or you want to vomit...or ALL of it at the same time) I had a few 'black out' episodes from the sheer stress and grief (he didn't die but it felt like the person I thought I knew never existed - he was living a double life - so I grieved as if that person I had loved was gone...) It took me nearly 2 years to stop having constant panicky feelings. Then I recently had a relapse. I won't try medication because I was actually ON anti-depressants when this all started and it made it worse (I put up with my ex's nasty behavior because I was numb thanks to the meds). Anti-anxiety exercises have made a world of difference, as has cutting out all caffeine. If I have a coffee, it's like setting myself up for a massive panic attack later in the day. I've come close to passing out at school (I had to go back to get a degree) and that makes it worse - then I get anxious that I WILL pass out - and the downward spiral starts. So caffeine is a no-no.
I know for me I'm sure cognitive behavioral therapy would help, but I just don't have the time or money at the moment. I'm sure that if your feelings are because of extreme stress causing panic attacks CBT would be of enormous help. I know it must be hard - do you have the amount of human contact that you desire? I know when I was at my most stressed, I craved human interaction and being alone for more than a day at a time drove me into a giant panic/teary meltdown. However, others want to isolate themselves. Everyone deals differently. It may be worth it to be proactive about what works best for you, even if it does take enormous energy in the beginning.
Just want to send hugs to you, and I hope your health is okay and that this was just a one-time episode. Take care of yourself.
It happened to me when I went to visit my mother who was in the hospital for a long time and near death.
I'm scared to death of hospitals and I passed out when I got there. I was about 14 years old when that happened to me and luckily it has not happened to me since.
I am now in my late 50s and not in the best of health but no, I'm not fainting nor passing out luckily.
I would definitely get checked out. It could be from a medication you are taking or it could be due to all of the horrible anxiety you are feeling from the death of your husband.
I am very sorry to read about this. I hope you get better very soon!
I got up quickly, rushed inside the very cool house & "Down goes Frazier".. I was able to grab the phone &U my best friend on the other end (also next-door neighbor) was there practically before I hit the floor..
I never knew Alice could jump a fence 
She took me to the ER where they pronounced that I was an idiot for sunning while pregnant
