bumping up.
I can't help much on the TOS surgery/hospital stay.

But,
I wonder if there is any "outside the box" pain relief that you could use after surgery?
maybe -
biofeedback, hypnosis, electrical stimulation (TENS, IF stim), low level laser, maybe some homeopathic remedies?

might ask the dr/surgeon about these alternative pain relief types-
they are aware of your reactions to other meds right?