I was in a new relationship for the last 7 months. I was tested a few weeks after we started to have sex and all tests were negative. 6 months into the relationship i started to develop severe tescticle pain along with lumps under foreskin (soft lumps that seemed to be in the muscle tissue). I went to the ER and all tests came back negative. I was given antibiotics and the pain and lumps began to dissapear. After a couple days the pain and lumps came back. I saw my family doctor who assured me that I didn't have an STD, but perscribed me antibiotics to take twice a day for the next 10 days. The pain had gone away as did 2 of the 3 lumps. I still have a small lump under the foreskin and the testicle pain comes and goes, but is never constant. The girl i had been with informed me that she did sleep with her ex-boyfriend 4 months prior to me developing these lumps and testicle pain. Both her and her ex were tested while i was going through this and both tested negative for all STDs. I haven't had any other symptoms other than this pain and discomfort in my penis and testicles. Haven't been sick or developed flu like symptoms. No fever, night sweats, or chills. Haven't had discharge or pain during urination. Any ideas what could be causing this? Should i be worried about the possiblity of HIV?