Okay, so I'm 17 years old and I don't think I've been abused, just molested from my early childhood until I was 15. I'm not really messed up and I can function normally. It's just sometimes when someone walks up behind me or out of no where gives me a hug or just grab my arm, I freak out and have a panic attack. It's like...I'm terrified of someone touching me, it doesn't have to be sexual at all and I still get scared. Only a few of my friends know what happened to me, and people at school think I'm weird because I have good days but will suddenly start having bad day and shut everyone out. I've had two panic attacks at school and one major break down. But I think I'm dealing well, but my friend keeps telling me I'm not coping well because I never really dealt with the problem. It's because the person molesting me was my half brother and I have bad trust issues and I don't even trust my own family because I'm scared of being hurt like that again.

Is it normal to feel this way? Or should I seek professional help?