You are an inspiration @wendy55 (even though I'm sure you would rather be someone wandering through life doing things unremarkable)
Realistically, how 'really ill' can you get in a couple of days? Yes, I know you are at risk of all sorts of diabolical nasties, but if that stuff hasn't presented so far, and you've given yourself enough time to figure out how you react to the new meds why not go? If you start to feel like shit, cut your loses and come home, lickety-split, don't hang around to see what will happen, just crawl on a plane. But go, please go, unless you are absolutely told not to. Mxx