I feel as if surgery is guaranteed but I know one wrong thing and it's not happening .

So i am soon getting tests for surgery and am really hoping to get it so I can live a mostly normal life but I always feel as if im guaranteed to get it but I know that one wrong thing and it means I can't get surgery but I font think I could willingly live or atleast live normally on medication and knowing I still have it , my life will be so limited to what I wanted to do , wanted to travel the world and pursue a career in politics , the career is still possilbe but the travelling is basically impossible on medication , so many countries taking medications into is basically impossible and the access to medical care is basically impossible , I wanan travel to every country but I doubt I can take my medication to Afghanistan, Syria, etc , also the medical care doesnf exist and travel insurance to places like that and places like Venezuela, parts of Mexico, dr congo , etc is impossible and it just feels so much i wanted and expected to be able to do is gone or severley restricted or much harder to do and some is so hard to do and woukd take so mcuh tkem and now will take much much longer