I can't speculate what might be causing your symptoms. I doubt it's herpes. However, 25% of the population has genital HSV-2 infection, so I wouldn't be surprised if you had a positive blood test. You could return to the clinic and request it; a negative HerpeSelect test for HSV-2 would rule out herpes for sure, and if positive perhaps your doctor would want to try antiherpetic therapy to see if it helps your symptoms. But I doubt it would help. There is no evidence that herpes causes erectile dysfunction.
Good luck-- HHH, MD
hey, ive had something similar, just came in the middle of the day today a rash though, not a pimlple, but its really tiny, just seems rashy and i was wondering if it was from wiping it with toilet paper,after wiping off the semen after masterbating , dunno for sure