A couple of months ago, I noticed some bumps on my penis near the head. They got a little bigger and more visible eventually. I visited a clinic, the doctor took a look at it, and sent me for some lab tests (all the available ones HIV, Sephillis etc), all came back negative. The doctor also said that it doesn't look like warts so it should be nothing to worry about. Until now, I really don't know what these bumps are and what should I do about them. Any help is greatly appreciated.