Good for you! I have no recent overseas travel experience though I can say with regard to making your arrangements and the feelings you're having all that is quite normal! A big surgical decision involving some big $ and taking you out of your comfort zone so yeah.. feeling like ya do sounds really normal to me!
Anyway you've made a good sound well thought out decision I think so I'm going to say "good luck and wish you all the best with this upcoming surgery!"
Please keep posting even if just to post about the jitters
I'll leave the suggestions to the experienced ADR recipients!
Maria