I will be giving a few light examples of work/social anxiety, if that is something you don't want to see, don't read on. Hi. I'm wondering if someone with similar anxiety as mine can give me some advice. I've known I have anxiety from my late teens/early twenties, but I haven't been able to pinpoint every single thing it comes from. I've been diagnosed general anxiety, but like many people, I think it's a rollercoaster of a spectrum for me and my triggers. Currently, I am unable to get transportation to the clinic that's open to me to go to therapy, and I don't trust the general practitioner to hear me out and give me meds that will help the deeper issues.
Recently I've learned of HOW bad my anxiety is when it comes to outside expectations. Whenever I am confronted with a change in my plan ahead of time to even just go to the grocery store, my chest gets heavy and I can't think of anything except what's right in front of me and getting through it. I cannot hold a conversation or think of anything more complicated than simply getting in and getting out. And this happens at work too, when I am suddenly expected to do more than what I already know (without at least one other person in the building that knows more than me), on top of which it's time sensitive (customers expecting a quick fix). I could not think. When I called my manager,  I could hear them but their words turned to mush. And when I could understand, my brain still couldn't connect their instructions to the screen and buttons in front of me. Sometimes when things like that happen I have to go to the bathroom and cry while hyperventilating. Besides that, sometimes it's to the point where very basic every day expectations weigh heavy on my anxiety. Thinking about a very basic task while doing something else or just resting, it gnaws and gnaws at me, but I physically cannot get my body to do it. 
I know I have a deep anxiety problem when it comes to confrontation, could it possibly be related to that? Is there a way I can practice overcoming and avoiding panic  in these situations?