Feeling worthless

I have been an introvert all my life and fitting in for me is hard. I always feel out of place and that makes me feel like not talking to anyone for days, causing me to think there is something wrong with me. I just wish to feel normal. I also have this constant feeling of anxiety, like I am going to mess everything up. It's totally overwhelming and maybe I am extra hard on myself but I can't seem to break out of this cycle. No matter what I do, I just can't be happy with myself.