I think I have social anxiety disorder?!

I think I have social anxiety disorder?

Like sometimes I'm at a grocery store and I don't want to look anyone in the eye because I'm afraid that i would have to smile back at them, because if i don't people would think I'm rude. I'm afraid to talk in front of a crowd, or any adult. At school, i can't focus on my work because I have a feeling someone is watching me, I know they aren't but just the feeling of someone looking at me scares me. I get nervous and I don't know how to react, and I start messing with my nails and fingers in a conversation. No one really knows about it, including my close friends because I act normal in front of them.
I'm afraid of even telling someone or asking for help.

yep i think ya got it. i have it and feel the same way but not as paranoid, just very self consious which creates the anxiety about how im gonna perform. i think yu can help yourself by asking your doctor... also you can try minimizing yourself, that not everything is about u. think of the better cause. like in the grocery. your there cuz you need groceries its not about you its about the stuff you need. this takes the focus away from you thereby taking away a lot of your anxiety. just realized my anxiety when i was 15 been workin hard the last 3 years this idea popped into my head and it works!