I worked at a high school doing IT. I kept student-returned laptops in a laptop cart. One day, to my absolute horror, baby cockroaches start crawling out of the cart, and infested my entire work area.
The cart was quarantined and treated by Terminix. After a while the cart was returned to me, and I had to sort through and clean/wipe all of them. I wish I could have just e-wasted the whole thing. Another round of hatching happened a few weeks later, from another laptop, but luckily I had put them in air-tight containers by then.
I had something similar, but instead it was feeling full and nauseous with just a few bites. Food smells were the worst, and can still trigger nausea for me. I never really got around to figuring out the cause because I was bad at getting healthcare for myself. But it cleared up, weirdly, around the time I had my wisdom teeth taken out. I got my life back after that, and I hope you do too very soon.
Wishing you the best and hope you get some answers with your upcoming visit.