Why do I keep having these bad thoughts that I did a long time ago?

When I was a child I did many things due to being curious of and private parts. I used to play house with other girls and boys which would lead to us touching each others private and looking at them. when I was about 9 I licked a babies private part out of curiosity- now at 24 I think about it does this make me a child molester or just that I feel guilty that I would ever do something like that. I hate these intrusive thoughts and why I did it- Now I would never in my mind think about doing something like this. I'm in of need help because I fear that just to make these thoughts or images of me doing something like this would make me want to hurt my self. I don't know what to do. Is it normal for kids to act upon this way out of being curious? Help me please