My son had something similar - I am certain the doctor will let you know, but, it may be (and your description sounds like) mollusCum contagiosum - my child broke out after a few swims in a local pool (which I shall mot name as we cannot verify 100 percent it is the source). If so, it is harmless, but, can take a while to disappear - his took over a year. As with any rash, the most impotant thing is not to scratch as that is hoe infections can occur. Good luck, and, I am glad you have been to the doctor for a definitive diagnosis.