poorabnormalone

Well, i have this problem. I was always pretty extroverted, i loved being the centre of attention and entertaining people. But then, i was grounded for three weeks once, and it was also during a holiday. Since then I don't do anything like that anymore, i'm quiet and even a bit shy. Everyone says they miss the old me, but when i try to be myself again it's just lame.
It's getting worse and worse, i just can't eat infront of people, i can't sleep in the same bed with people and i get anxiety attacks when it is silent, for example in exams. Another problem is when my stomach makes noises, I'm so incredibly scared of that!
Once my best friend and i where eating at mc donalds and i ha just finished my food, then a boy from our school came and sat by us, i was so embarrassed or something that i just couldnt talk for ages! And in 2 days I'm flying to europe and in the plane i'm going to have to sit next to a stranger! I'm going to also get anxiety attacks then!
I would appreciate your help very greatly!!