Pain in left testicle. Please advise.

Hi, around 2 years ago I was diagnosed with Epididymitis. That got treated within a week, at least I thought so. But even after a few days I kept feeling mild pain and discomfort in my left testicle veins. I went for the ultrasound and things were normal. But that mild pain and discomfort never went away. After working out it increases. Taking rest and keeping a pillow under the pelvic area while laying down gives relief. During the pain I feel nauseous and the left side of scrotum enlarges. I feel discomfort in my left leg and abdominal area during the pain. It goes away after taking rest but it feels like something is pinning to my left testicle where the veins are joined. This continuous pain and discomfort (it keeps happening often) does not let me focus on my work. It seems that some bacteria remain dormant during the treatment and now causing the problem. Also during ejaculation, it tingles in the left testicle and veins joined to it. Please advise. Thanks