THE HEALTH INFO

I am 15 years old and I don’t feel very confident about myself. I get very nervous in public situations or in large crowds. I just sort of freeze and I don’t know what to say. Like for example, at the start of Grade 9 there was a grade 9 day for all the new students before school started. I was walking into the gym where everyone was but I saw everyone talking, and I knew none of them (different district) so I started sweating and I turned around and walked home. Even in a store, I get nervous of the people around me. I take medication for depression and anxiety but it doesn’t seem to help me, and when I look in the mirror I hate who I look at. Maybe some people will think this is weird because I am a guy and guys are supposed to be tough or whatever, but I just need some advice about what to do to help myself. I don’t want to drag all this into my adult life once Im out of high school so I need to know what to do.
I will appreciate any advice you have for me.