Testicle Injury. Situation that i have.

I am a male of 18years. 7 months ago I had a injury to my testicles. I visited a gp and a urologist and explained them everything and also I got an ultrasound everything turned out to be fine. But I checked multiple times and I felt that there was mild numbness a bit above my left testicle and on the left side of the penis. The numbness I think has reduced but I still feel like there is less sensitivity on the left side like from the left testicle to the left side tip of the penis the sensitivity is lesser as compared to the right side I have notice this while masturbation and also just touching and checking multiple times. It's been seven months and I am not sure if I should just give it time or what , I am really worried pls help. Also somebody here on practo recommended semen analysis let me know if this had something to do with the situation that I have.