So 2-3 weeks ago I noticed a bump on my penis. Flesh coloured at first but developed a white centre about a few days ago. Today, the white centre was gone and it appeared to be burst, kinda like an open sore. I should mention, I feel no pain now (although there was some pain and burning urination, very small amounts, about 4-5 days ago). The bump did not appear to contain any fluid inside of it at first, so I thought it might be a wart at first. But when the white centre appeared, I ruled out warts. I posted the current state of the bump, as I said, it is burst. I hope it is a pimple; I just had an STD today, and I will not get the results for another week. The doctor said its hard to tell.
any help would be appreciated.