I got a bump on the penis after masturbating without lubricant. How to deal with this?

Hello doctor,

I am a 23 year old male and in good health. The last time I was sexually active was over two months ago, and after that, I usually would masturbate two to three times a day with no lubricant. I developed a small bump under the head of my penis. So, I looked up online and it was all HPV and herpes. I was scared but very doubtful it could be those. About a week later, I ended up getting drunk and masturbating pretty hard and for a long period of time and got a few more red bumps within the next couple days. Then, I shaved against the hair since I had hair going all the way up my penis shaft. I had several bumps the next day. The original bump has gone away as well as the other bumps. Now, I just have a bunch of little red, painless bumps around where the hair grows, but they have no hair coming out of them. They only really have slight pain if I squeeze or pick at the area. I hope this is all nothing.

Thank you doctor,

I have attached a few pictures. Please find them.

Thank you doctor,

I am just glad there is no possibility of STD. Thanks so much.