Does anyone else feel unwell from mild physical movement?

So I’ve been dealing for stomach issues for most of my life. I’ve strongly suspected that it’s led to mental health issues that kept me from living life, but that’s not the main issue. Right now, I’m desperately trying to find a job with little work experience. I’ve been applying everywhere and walking into businesses, tripping over my words to introduce myself.

The problem I’m having is that when I’ve been moving around just a little too much, like going to the store and trying on clothes to buy for a potential interview, I start feeling physically unwell. I get really hot and start sweating, my nose starts running, and I start to get nauseous.

Now I’m wondering what’s going to happen if I get a job that requires physical work for 8 hours. My stomach is always on fire and I can deal with that, but I have no idea how long I’ll last if I feel this awful at work every day.

Does anyone else have these symptoms? I need to go to a doctor, but I need health insurance, which means I need a job.