Funny how, when I was younger and looking for a job, I had thoughts about the places I would work and imagine how it would go and if I found a scene where something went wrong I would get scared and avoid applying to a lot of stores. I was picky I guess and mostly because I planned too far ahead on any job I came and read across. I always made myself think that I couldn't do this or that from the job descriptions.
Also there comes the McDonalds (sorry if I keep bringing it up). Younger me thought I would never find myself working there, the what ifs of screwing a customers' order or just end up being anxious and frozen on the spot at the many people I would be dealing with. Nop, I ended up working there a bit after turning 21 and I ended up enjoying it. Sure angry customers and barely tolerable managers, but those never imbalanced the positives/positive people. I actually went on to become Shift Manager quickly after a bit.
I quit months later, mostly because I wanted to go back to something I had found early on that I was very, very afraid of screwing up. Care-giving. That was actually my very first job and I will tell you why I'm telling you all this. I was scared and anxious that I would hurt the seniors. I thought they were fragile and weak. I thought they would be rude and angry people. I thought I would kill them if I gave the wrong medication or even startle them with minor things. Once again, that was not the case. They were the opposite of all that. I enjoyed it a lot, I loved interacting with them, playing games with them, watching TV with them. Anything to make their lives a bit more thriving.
The reason I am telling you this is because I was actually always in a high anxiety state around people (besides the phone >.<), I thought I would end up doing something wrong in front of them and I would get yelled at or something, and... I am not the best in handling my emotions. I cry easily when such things happens, unfortunately. But, honestly, jumping on those jobs actually made me forget the anxiety of doing something wrong or screwing a task in front of a person and also I found what I actually really enjoy (Besides Psychology). Yeah I still cry, but none of those scenarios are the cause of it anymore - not the anxiety anymore.
Heck, even online I still get tiny specks of it, like now, answering to you makes me think you are good with what I wrote on the first, and you don't need to read this post, if you might like or not like this post, upset you or something and makes me want to delete it and leave you be, but I am forcing myself to post. There's a reason I do not post a lot... or only post where I know a lot of interaction won't happen.
ANYWAYS, I am rambling, but I really hope you find ways to help yourself in the areas you need.