I am scared that I have a lump on one of my testicles.
That is horrible. Why do you have a lump on one of your testicles?
Because I'm 18 and male and i have a history of cancer in my family
If you have a lump on your testicles, you should get that checked out ASAP by a doctor. You may have cancer.
Fuck, I'm gonna die, I know it.
You might not, it might not be as bad as you think. But you will only know for sure if you go to the doctor to see what the lump is. Then you can decide what you want to do.