Hello. I am 20 years old. The last 2-3 week I've been having pain sometimes on my testicles (mostly the left). It doesn't hurt all the time the pain isn't that strong. I don't see any lump on my testicles. It might be a cancer but I did a bit research and found some testicles with varicocele and they look almost like mine. I have an appointment tomorrow but I just wanted your opinion on what it might be?