I am a 13 year old girl.

Okay so a little while ago I was sexually harrassed.

First off I can't have people touch my stomach. I don't know why, but when I'm lying down and someone touches my stomach i freak out; I feel vulnerable and frightened and I want to get out. The worst is if it's a guy especially if he's older or if it's a doctor. Is it possible this is cause of what happened?

Next, getting into relationships with guys is really tricky cause I don't want them to do anything. Lately a guy was flirting with me and tried to touch my chest and it made me all uncomfortable and scared because he wouldn't stop even when I kept telling him to.

And lastly, I have to go for a "complete physical exam for teens" soon and I'm terrified. I know they make you undress and stuff but if they touched my chest or down there or my tummy idk I'm so scared. Plus I was told that they stick something up you which I can't deal with right now, what if they broke my thing? Also the only doctor at the place I go is a guy, there are no girl doctors there.

Is my fear of having people touch my stomach related to what happened?
How can I get out of the doctor touching touching me? (chest, down there or tummy)
What will the doctor do to me?

My parents dont know about what happened, and I don't like talking to them about this kinda stuff. I go into the doctors alone.

Please help me I'm so scared.