I don't know how long ago your husband's death was, or what your relationship was like, but anger is definitely a huge part of grief most of the time -- anger at them for dying, at yourself for not preventing it, at the health care system for it's failures, at friends and family for so totally not 'getting it.' But that doesn't mean that somehow your anger isn't justified, or is a way of not feeling other emotions too -- it's just one more piece in the long litany of grief.
I worked as a grief and trauma person for years, and have a ton of contacts -- I'd be willing to try to find you somewhere closer to you than the poor excuse for support you've been offered so far, if you're comfortable giving me a general geographic area.
Other ideas for help -- Are you employed? Your employers may have free or low cost services through an Employee Assistance Program (EAP) - check with Human Resources. Is there a closer Hospice program than the one you got your husband's care from? Where I am at least, we offer bereavement to anybody, whether their family member died on our service or not. Or perhaps a local hospital or nursing home has a grief support group in your area? I can't say I recommend the pet support group, lol -- you're as likely as not to end up wanting to punch someone who's upset over their dog's death than finding any meaningful sense of being not-alone. Not that pet loss doesn't cause grief, but it's not the same thing as losing a spouse.
I hope this helps, at least a bit.
Blessings,
DLO