Experiencing painless bumps on penis, tests all negative, need second doctor opinion?

A few weeks ago, i experienced a few bumps on the glans of my penis, they had a small head to them, and within 36 hours had scabbed up. There was absolutely no pain with them or itching. They never opened up or oozed or anything. Now four weeks later they are practically healed, except for some raised skin where they used to be. I understand that this is a sensitive area and these bumps may take a little while to subside.

This is the second time this has happened. Both times I went to a clinic, and had it looked at. Neither time was the doctor able to tell me what he thinks it was. I got full std checks, including hsv, and those came back negative. In your experience, what can cause something like this to happen? Could it just be some sort of skin condition, an infection, or fungal? I just cant see to find anyone that knows, or anyone who is familiar with painless bumps on the glans of penis.

Last, Ive been experiencing tightness in my inner thighs throughout this process. I cant shake it. I’m starting to think that maybe its all mental, but my legs do feel tight. And at times i had some perineal discomfort. I appreciate you taking the time, just looking for some advice or guidance, as what Ive gotten so far has been underwhelming to say the least

Age:25
Male
Medications: None