Help i have a major health problem!?

Im 13 and have blood in my urine and stools, ive been reading these stupid websites that tell me ive got prostate cancer and im gonna die and such things. Please do not bombard me with answers like Go To the doctor, tell sum1 coz that makes me uneasy. I dont have the courage to tell anyone yet i will do it in my own time. Ur thoughts and opinions please?