I booksluv, and welcome. I don't know the answers to your questions.
A while back, there was a post about this subject. This forum is a bit slow, so it may take a while to get some responses from people who've experienced what you're facing.
I wish I could help you more, but wanted to welcome you anyway.
Best of luck with your surgery and recovery.
Osteoarthritis, bursitis, Cervical Disc Disease - pinched nerves, Raynaud's, migraines, severe anemia, severe allergies, anxiety & PTSD