Social Anxiety

I keep getting anxiety almost everyday and I hate it so much. For example: when I’m in school and say if I raise my hand up to the teacher for an answer, I always feel like I going to embarrass myself in anyway. I hate it so much and it makes me feel so bad about myself. Like another time I was in class and in my school we have to give our last nights work or current work up to the teachers desk after your done or etc and I always get so scared to go up to her desk and I used to sit next to this girl Alice and she started mocking me and laughing at me when I said I was too scared to go up to the teacher and it just made me feel even worse. And I know this is very off topic but as well I feel super embarrassed to eat around people because I feel like they will judge me for eating to little or much and sometimes I eat so much to where I don’t know when to stop and I really want to be skinny because I don’t feel it but it’s just so hard for me. It’s like my brain is telling me to stop but my heart is telling me to keep eating.