So let me preface by saying I am already chronically ill and have been diagnosed with depression so there's that. 

Basically, anytime I am somewhere where I feel like I can't "get away", I start to get extremely anxious and have sometimes had mild panic attacks. The first time I remember it happening, I had had some rich food for lunch and when I got in the car I felt a little nauseated. I suddenly became scared that I was going to pass out or throw up in the car and had to get out before my mom started driving and run and lie down in a nearby public bathroom. 

Since then I have had several instances like this. A few times as a passenger in a car, once while I was getting my hair cut, another when I was having a balance test because I had to have monitors strapped to me. There's even been times when the feeling will creep up on me in a doctor's office while we are just talking because I feel "cornered". 

If I can get up and walk it off, I am completely fine. Like once I sort of got the feeling when I was in line at a grocery store, but once I started jiggling back and forth some/pacing in my own bubble I felt completely fine.

I have no idea where this anxiety has come from, like whatsoever. I have had multiple MRIs with no problem AT ALL, I get my blood drawn semi-regularly with no issues. It's just in the last 4-6 months I have had this absolute strange feeling of being "trapped" or "cornered".

Does anyone have experience with this sort of thing? Because of all my other medical bills I can't afford a therapist and I don't expect Reddit strangers to be a personal therapist, but maybe I can get some tips and tricks. I don't expect a diagnosis or cure, but I'm open to things I can maybe implement.