Im not sure where i should really place this but hey,
3 years ago I found a lump on one of my balls, and thought nothing off it at this time i was only 14 at the time, then i went through a really depressive stage where I hated everyone and so forh and felt it spread from one to the other, as well as to one of the tubes (sorry for the non scientific vocab) and then felt chest pains at the like at this stage I knew and now that its too late and really dont want to go to a doctor, to be told Iv only got two years or so to live.. the thing is I wouldnt want to go through the treatment and know that im gonna 'beat the clock' anyway,
Because when i see some one whos going through chemo I naturally feel sorry for them, the thing is this was my own fault and really dont want people to feel sorry for me, and for people to think im less able...
the think is the only person I told was my ex gf (gf at the time), and we split up like a couple of days later... the thing is I want to tell my friends but really dont want them to feel pity for me and secondly not for them to tell my parents behind my back and its just been ripping me up as to how to tell them 
regards
Ed
Going to add my 0.02 myself because it might NOT be what you think. I had a cyst removed from the side of my testicle when I was 15 and found it rubbing my nuts. At first I thought it was cancer but decided to ignore it until my brain couldn't take it anymore. Well one night I was being a bit "active" and while rubbing my nads caught the spot and it not only brought tears to my eyes it also made me pee uncontrollably. Well a trip to the urgent care brought out the truth and things were taken care of in an outpatient setting.
In short it might not be cancer at all but my question is do you show black or discolored flakes when you ejaculate solo such as masturbation? Even the absence of the flakes is not a reliable indicator and you should go see a doctor, this could turn life threatening in a very short period of time especially if your immune system goes on the attack. To be frank and honest this is not something to f*ck around with, whats easier to deal with, swallowing your pride and telling your parents or having a doctor suggest funeral arrangements? Choice is yours but I would rather tell my parents first so I could at least graduate.
JR
Go to the doctor. I had a similar problem to yourself at one point. I agonised over it for ages. The doc fixed me up very quickly indeed.
It may be different for you, only one way to find out.
You should definately get to a doctor asap. The sooner you get diagnosis and treatment the better!
As far as telling your friends and family, tell them when you feel ready. Don't feel the need to tell them right away. Go see a doctor first and see where everything stands then when the time is right you can tell your friends and family what's going on.
Good luck. I hope everything works out for the best.
i would definitely get that checked. like oberon said, it could be something that can be taken care of.
as for telling your friends/parents, i'd tell them when it's just you and them, obviously. but just say that you've noticed something that you're concerned about (if you're telling your parents) and you'd like to/should get it checked.
and if you're telling your friends, then just tell the ones you're close to and can trust, then ask for suggestions or something.
take care.
I know you don't want to hear this but you need to see a doctor. You could still get treatment and be fine.
Start out by contacting a cancer helpline. Like any hotline, they will keep it as anonymous as you like and they can help you deal with the situation. How to get treatment and how to deal with telling people.
Of course, there is a chance it's not even cancer. You won't know unless you have it checked out.
Good luck and take care.