Fear of people and volunteering don

I signed up to sort medical supplies at a warehouse for two days. The whole initiative has to deal with taking supplies from hospitals that don't need them and then delivering them to countries that don't have what they need. I felt really good about helping out. But then I actually arrived at the facility and things got so much worse.

For one, I underestimated how loud I would have to talk with my mask on. Every time I would ask a question about where supplies go or how to box them, the supervisors would ask me to repeat myself over and over. I felt like they were so frustrated with me. I just wanted to disappear, and eventually I had to stop asking questions because my fear of confrontation escalated to the point where it was unbearable. But then I just seemed even more incompetent because I was putting things in the wrong places.

There was a also one supervisor who was very curt, which isn't something inherently bad, but he just seemed so angry at me. I began panicking every time he said something about my organization or declined the stuff I had sorted because it was expired. I felt so dumb in front of everyone. And on top of that, I couldn't even seem polite because I was wearing a mask. I feel like everyone hates me.

Maybe I'm just overreacting. I don't know. But I feel a little better after venting.