I am turning 14 this October and I have never had sex before but when i got out of the shower a couple weeks ago i noticed several small red bumps on my chest, then they spread down to me pubic area and the onto my penis and then onto the back of my butt. I went to a doctor about it and she said it was a heat rache, but lately I havn't exercised or done anything to raise my core temperature. Do you know what this is?