Do I have POCD (Pedophile OCD)?

I am an 18 year old male. Today is August 24, 2016. As of August 20th I have been getting the horrible guilt ridden panic attacks (not sure if they're actual panic attacks, but you get what I mean) that I am or may be a pedophile. I have never had any legitimate sexual attraction to prepubescent kids. A while back I used to masturbate to ~13 year old girls simply because of curiosity and the fact that they had fit bodies, not because of any sexual attraction. Recently because of these attacks I have noticed I am less interested in girls my age thinking that I have Pedophilia (many people told me I don't). I have posted a few similar questions on different websites *mod edit* where people told me I am not a pedophile and that I am fine. That calmed me down for about half an hour. I look at (normal) pictures of 13 year olds to see if I have any sexual reaction, I don't, the best I can say is that they look good for their age and that they don't actually arouse me. I never had and don't have any intentions of touching a child, molesting a child, nor do I have any weird extensive fantasies (I had like 2-3 that were intrusive thoughts recently that I stopped because I know pedophilia is wrong and that I know I'm not a pedophile). I am thinking of talking to a psychiatrist but that would mean telling my parents and I don't know how they will react to me telling them about all of this.

Finding yourself professional help could only be a good thing, but I understand your reluctance to share these thoughts with your parents.

I don't know what kind of relationship you have with them, but you could simply request to see a psychiatrist for intrusive thoughts that you worry may be obsessive compulsive disorder, and ask your parents to respect your privacy regarding the nature of said thoughts. If they still press you, you could go so far as to admit that the thoughts are disturbing and even that they're of a sexual nature. That keeps the "P" element out of it, but will probably shut all further inquiries down fast.