performance anxiety???

I’ve been dealing with anxiety pretty much my whole life. I feel so anxious even when I'm with my family members, friends and everyone. Last few months, I've gotten better at socializing. Not a lot but I can handle a lil conversation without my body crumbling, even with strangers. So that's some progress.

So yesterday, we had a family get-together party or whatever. there was like 10-12 people. Everyone was singing after the party. I got a chance to sing too. I have a pretty decent singing voice, and I do sing too but only when I’m ALONE. When no one’s watching. It’s when someone’s watching me, my anxiety kicks in. I thought I’d give it a shot, singing infront of someone. it's like 10 people. What could go wrong right? It's not like there's thousands of people.

But after the first two lines, I started having an anxiety attack. I was shaking, couldn't focus on the lyrics, and my mind was all over the place. I ended up stopping. The worst part was everyone laughing. it just made me anxious even more. If there was any hope or courage left in me to sing in front of someone, it pretty much disappeared after yesterday. Got any advice? Like, if there's anyone who’s been through the same thing?