Frustrated I can't do things

I keep getting frustrated with myself for being, well myself. 

I went out today which nearly half killed me anyway because I'm anemic and not a lot of energy but also the autism and anxiety took it out of me as well. This woman who went to school with me a few years ago started talking to me, I couldn't and still don't really remember her but she was talking about it and straight away I felt triggered. So much anxiety. My breathing got fast, my hands sweating despite the fact I was cold, couldn't make eye contact and said hardly anything because my throat got tight. I seemed rude I expect. That bothers me.

I got home and basically just fell to pieces. I was still extremely anxious, hands were shaking and added extra fatigue which I just do not need right now what with my other problems. The post came and I found I couldn't go to the door until he was gone. Just frustrated that I can't do and face things that for other people are easy and not a problem.