Does this sound like prostatitis ?

For about a month now I have had pain in my right testicle that spread into my groin and hip area. Also, occasionally I feel pain and discomfort in my upper right abdominal near the liver. This all started the morning after having unprotected sex but I went to the doctors and std test came back negative as well as the urine test came back negative. I have been having trouble getting solid erections since this day as well. What could be causing these problems?