I am a 25 year male that noticed 3 small red bumps in a straight row on the shaft of my penis about an centimeter below my penis head. Each bump is about a centimeter apart and has a small scab on the top. When I get out the shower, the bumps appear to have a white head on the top of them. I am very scared of what it may be. I have had unprotected sex with a number of different partners, however I have had a girlfriend for about three months and she is the only one I've been with. I just noticed the bumps one week ago after we had sex a few a nights before for a pretty long time at a vigorous pace causing a lot of friction. The bumps don't really seem to hurt at all but they haven't changed in a week. I looked up symptoms for stds and now I'm not sure if I have symptoms or if I'm just freaking myself out. My scrotum is a little itchy but it seems like it's been like that for years. Please give me any information you may have because I am truly dreading going to a doctor and finding out. Thank you.