Painless red spot on penis head. What can it be?

Hello, I recently posted but I am reposting to provide some photos. 4 days ago I noticed a small red spot on the head of my penis on the left side of the corona (crown) right after masturbating. I am not sure if it had just occured then, or maybe the day before while partaking in sexual foreplay (received oral sex, masturbation). Upon seeing what seemed to be a red dot I immediately started to worry. I was unsure if maybe I had just caused this by masturbating since I noticed it immediately after cleaning up/showering or if maybe it got hurt the day before during foreplay or receiving oral sex. Regardless it is still worrisome and has not gone away since I’ve noticed it. I have done research and herpes seems to either have a puss bubble or comes in clusters which doesn’t seem to be the case with me, this is just one spot. In most photos I’ve seen of genital warts, they seem to be more raised instead of flat and mostly seem to appear on penis shafts or under foreskin. Didn’t see much about genital warts on the actual penis glans (head). I am uncirmusized but my foreskin is almost always retracted and I am very clean. I’ve researched balantis and considered that but I am really not too sure. I am not sure what to think about this, but I would really like some peace of mind. The color of the spot tends to vary in lighting, sometimes it is very faint and not too noticeable, but in brighter light or in certain angles it looks bright red and I think in the most recent photos I took you may even see a small dot in the middle? Please let me know what you think. 

Thanks! 

Hey guys, I haven’t received any opinions on this and I am extremely anxious. Anyone have any sort of advice or thoughts on what this could be? Should I be worried?? At this point it has been 5 days, still not feeling pain, stinging or burning. If I recall correctly the day I noticed it, I did feel a random little pinch feeling that night just a few times. But I had also just masturbated. I just really don’t know what to think of this. Someone help please, I’m an anxious wreck.