Hi, I recently turned 15 years old and today, after masturbating for like 30 min, my right testicle, along with the regions near it and somehow my back, started to hurt (especially when it touches something). Then after around 20 min i felt a lot better and fart a lot. I m worried if i have the testicular cancer , because 1. my right testicle, which often hurts, is bigger and heavier than my left one; 2. about 1 year ago i had found a lump/bump on my right testicle, but now i cant find it as its still hurting Additional info: i masturbate around twice per week and am a virgin