Keep ahead of the pain with the oxycodone.
Take the pills as directed by your doctor, of course, but explore the possibility of maybe cutting them in half or quarters. I would take them as long as you need to, but no longer than that. It is most important to keep ahead of the pain, so consider the pills to be your friend, but be cognizant of their effect on your body, and try to cut them back as your pain gets better (again, after speaking with your doctor).
I've taken hydrocodone for spinal issues, until the pain got so bad, they switched me to oxycodone. I was warned by both my doctor and my pharmacist to take only what I thought I needed, and to not be afraid to cut up the pills. I ended up taking a total of about two full pills because they were kicking my ass so bad. However, those two pills, cut into about 8 pieces, got me through the soul crushing pain until the pain became "only" really really bad.
You're going to be surprised how quickly your surgical pain is going to start to improve.
Lay low, be good to yourself, and try a little focused meditation to come to terms with your pain.
Feel better real soon! 
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