I think I might have anxiety or social anxiety. I’m not sure. I know you should go see a doctor, but I don’t know, it stresses me out thinking about it.

Here are a few things that make me think this. I go to a school where you wear uniforms. A couple times a year, we get to where civies (civilian clothing). I dread those days, and days where I go out. I’m always scared of what people will think of what I wear. I don’t choose clothes because I like them, I choose what clothes to wear based on what I think less people will judge me on, or what blends in the most.

I hate standing out, it makes me super self conscious. 

Whenever I present anything in class, I stress out. When I do speeches in class, so only in front 20 people I know, me legs shake and my voice trembles. I’ve recently started repeating to myself 
“They don’t care. They don’t care. They don’t care if it’s shit, they don’t care.” 

Lastly, for a year now, I’ve had the same really bad stomach ache that ends in vomiting every so often. (8 times since last year). We went to see a doctor who blamed it on stress, and gave me so pills to fight the pain. However, I think it might be anxiety instead. I don’t know. 

Can anyone help me figure it out. Are any of these things symptoms of anxiety, or me just being over precautious?
Thank you for reading.

Edit: couple typos