I won’t comment on your health anymore than to say I hope it works out for the best.
What I will say is Aviation is a very rewarding career but, has its highs and lows, and many hurdles to pass. Don’t for one second think that because international ops MAY be off the table that you can’t have a rewarding career in Aviation also. I understand to a bright young lad/lass like yourself that you may think that international airline pilot is the pinnacle, but there are a wide spectrum of great jobs in Aviation, majority outside of international airline ops. Examples being obviously domestic, regionals, RFDS, you may decide a career in training and checking is for you, the list is nearly endless.
Best of luck!