Bumps

Ok i'm 16yr old male
and I have had only 1 sex partner and a week after I had sex with her, I developed bumps on the shaft of my penis...They arnt red in any way..Just small bumps that stick up a little bit, and every once in awhile I get one really big swelling one in the same spot every time.
They are the same color as my skin no miss colorment at all.

I dont know what to do or any idea what they might be...But they now poped up on my stomach to right above my belly button.


I looked through many web sites and have found nothing that look or compare in discription to it....They have not gone to my testicles and being its been about a year now I do not think they will.


I havent had sex again because I dont know if it will spread during sex, being I have a lack of information on it.


Does any one know what these may be?

Please get back to me if you know or know a web site that can explain this.