Testicle Cancer Hi, Im 17 Years Old And I Feel As If I May Have Testicle Cancer?

Hi, Im 17 years old and i feel as if i may have testicle cancer? - testicle cancer

I am for two testicles and found a small lump on the back of the left testicle, may be smaller than a BB shot. It is difficult to say whether they grew up, because it is small. But lately, I experienced pain. I watch this and this is one of the symptoms. Im not sure what to do. I have tested for sexually transmitted diseases and I am negative. So, does anyone have any ideas or suggestions, please?