STD or not?

[springs1]

I had an encounter with a prostitute about 3.5 months ago. I'm a 23 year old male. It was all protected, no actual intercourse, there was genital-to-genital contact though. Starting 2 weeks after the encounter, I was afraid that I may have caught herpes. This was also a month after I'd started going to the gym. I thought it was herpes at first, but after seeing my doctor around 5 or 6 times about it, he convinced me that it wasn't. I never actually saw any spots or sores, except for one that popped up on my inner buttocks, but I don't think that was related, and neither does my doctor (since she never really touched my buttocks in any way, and it wasn't a cluster, just one spot). I also went to a dermatologist, who did not see anything and told me that it was most likely not herpes either.

At the moment, I'm getting a sort of burning feeling every now and then near the base of my penis (both left and right sides). Again, no actual spots or sores. This leads me to my questions:

1. Is it herpes and is this asymptomatic viral shedding?
2. Could it just be from shaving the area and letting the hair grow back? Last time I shaved the area was 2 months ago.
3. If neither, what on earth could it be? I've been bothered by this for 3 months.

Sorry for the long read, but any ideas would be nice. Thanks!

[springs1]

thanks grace

[springs1]

bump