What Causes Lumps With Itching In The Abdominal Area?

I wasn t very concerned at first thinking that the bumps were simply pimples or ingrown hairs but now I m starting to worry. These bumps are appearing in small clusters on the shaft, base, and lower abdomen. They seem to have a white center that is relatively easy to scrape off leaving it to resemble a crater of some sort. They now itch and burn sometimes leaving the whole groin area sore to the touch and by movement. I did hookup with my ex recently after about two years but she did not appear to have this condition. I also might have worn a pair of my brother s briefs by mistake. I read that this is most likely mollusca contagiosum but I would greatly appreciate a second opinion see as how some of my descriptions do not quite match up with other symptoms. Thanks in advance.