For sure this isn't an STD. The onset soon after sex is a coincidence, and anyway, no STD can cause symptoms only a few hours after exposure; 2-3 days is the minimum for any and all infections, including herpes. And your description doesn't even hint at herpes, both because of the location (initial herpes in men almost always is on the penis itself) and your description. That some lesions have white heads around hair follicles supports the idea of a bacterial infection of your skin, such as staph or strep. Sweating can contribute to that sort of problem, and so might the apparent poor hygiene you describe.
This sounds like a rapidly spreading problem that might become serious if it continues to get worse. You should see a health care provider right away for diagnosis and probably a prescription for an antibiotic. Do not cut corners by trying any further to get definite answers online; you need to see a health care provider in person, today. But don't worry about STD.
Good luck-- HHH, MD
Glad to hear you are under proper care. Good show! Take care.
Dr. Handsfield,
The doctor that treated me agreed with you on all counts. The rash is not an std. He gave me cephalexin in 500mg pill form to take 4 times a day. I have a follow up appointment on Thursday and he said he was confident that the medication should do the trick.
Again thank you very much for the help. It really helped ease my stress levels and if it were not for your advice, I could have possibly developed a much more serious condition.
Thanks
Doctor Handsfield,
Thank you very much for your prompt reply. I am glad to hear that the possibilities of an std are eliminated. I will see my college's health care provider as soon as possible. I must admit that your answer brings quite a bit of relief to me. I will provide you with what the school's Dr. says. I will also make sure to reference your response when visting the Dr.
I will also avoid using my dirty compression shorts (I normally have good hygiene I promise!).
Again Thank You!