Hi i am 15 years old and a virgin. About a month ago i noticed a spot outlined in red on the crown of my penis and the inside was skin colored. Now there are multiple on the crown, and Im not sure what they are. I went to a doctor but at the time they didnt seem to be showing, but after some irritation they are visible. They do not hurt and they are not raised, could it be an std even though i have never had sex?