About 2-3 weeks ago 2 days after having sex I noticed 3 very small red spots on my penis. They were barly raised and not in clusters more spread out on the penis shaft. I have no itching, burning, or anything. I had a STD test later that week and they said it does not resemble herpes at all and I tested negative for syphilus, gonoreha, and clymidia.
They went away about a week later but 1-2 has appeared again since then after masterbating. I've already been tested and I'm really not sure what these could be. I just want to be sure I dont spread anything to anyone else or have an issue that will affect me in the future.