Is The Pain + Lumps Cancer?

[dannycheese93]

I am 15 years old and really worried. I have discovered that I have 2 lumps in my left testicle and 1 in my right. The ones on my left I notice more than the 1 on the right. 1 lump is a hard pea sized lump next to my epididymis. Sometimes the lump hurts and sometimes it doesn't. I have another lump aswell on the left testicle which is the size of alf a grain of rice and thats also what it feels like. That lump doesn't hurt to touch. I have an identical one on my right testicle to. In the last couple of days I have had pain mainly in my left testicle which goes away when I lean forwards. I have also had pain in my groin and abdomen. I noticed the lumps only a few days ago and plan to make an appointment with my GP soon. The pain in my groin and abdomen has gone down quite alot since yesterday so this maybe a water infection or something because I have also been going to the toilet alot more. I have no history of testicular cancer in my family. Could it just be an infection? or is it definitly cancer? Im really scared and I haven't
had the courage to telly my parents about the lump yet.