I'm trying to be a stoic, and I will deliberately try to accept anything that I cannot influence in this very moment. Approaching medial issues, I think that the only thing you have to accept (until your death) is that your previous attempts at improving have failed; so as long my son's hearing is not good, I'll keep on looking for things to try out. There are time and cost constraints of course; sometimes I go for weeks without researching anything to improve the situation. But the motivation to do something returns naturally when he's in pain again, or is misbehaving very badly because of this.

My heart breaks for you. Wishing you the best.