I'm sorry to hear about your condition.
I don't know anything about it, and the kind of pain it is, but I see from your user name that you are likely a steel string Collings player?
If so, you might benefit from playing something that is a lot easier on the fingers, to tie you though this period.
Something like this:
Godin Multiac nylon crossover
A guitar like that not only sounds good, but is super easy on the fingers. MUCH easier than a steel string guitar.
I realize that this might not be your cup of tea, especially if you're a die hard steel string player, but this might be something very useful to consider just to bridge the gap. Certainly better than not playing at all.
I'm not recommending this particular model. There are a number of similar guitars out there from other manufacturers.
I just think that a guitar with super low action and tension would be helpful for you, given the circumstances.
Good luck with your recovery!