How do I know if I have severe anxiety?

How do I know if I actually have severe anxiety or not? here are some problems that I have been dealing with. -I cant be in or around large groups of people. -I can't hold a conversation on the phone, let alone answer it if it's someone I don't know, especially if it's a phone interview for a job. -I struggle showing up to work (causing me to quit automatically) without thinking im going to mess something up or make someone upset. -I'm too much of a people pleaser and don't want to make anyone mad or else I get anxious. -I can't sleep at night without waking up feeling like I'm choking on something (been going on for years now) that's only a few things I have that's going on. I dont know where to go to/how to ask for help.