Prostatitis - Fistula Can Lead To Cancer?

Now 22 , at the age of 13 , i started to have urination difficulties , standing in front of the toilet for about an hour , feeling the urge to urinate even though i know at the same time that my bladder is almost empty and finally a drop or two come , it continued for about a year then it was gone , for the last three years i have been having the habit of excessive masturbation ( sometimes 4 times per day ) , most of the time i go directly into sleep after masturbation , and as result the usual need to urinate after masturbation is suppressed and the urine is retained till i woke whereas i feel its reflux in the  ureter , during this period  whenever i go to sleep with full bladder ( regardless after masturbation or not ) , the urge to empty my bladder never woke me up , but what came up recently that  i started to drink half liter of beer before i go into sleep directly every night for the last 3 days  ,  yesterday i felt my prostate hard as rock , this sensation is mild so far , it is expressed more when i sit on something hard or try to urinate , now today this morning when masturbated after 2 days of cutting masturbation off , this mild sensation became to increase , then afterward masturbation when i try empty my bladder i felt more pain and couldn't pass urine , when i tried about 2 hours later , i managed to do it hardly after i tried to strain my bladder , whereas during these 2 hours i felt urine retention but with much less of the natural urge which drive you to the bathroom but i still feel the pain of reflux at up the ureters  , the one thing which is so clear , that my pain is expressed from the prostate as hardening or feeling it like a rock , with mild sensation of burning . Also i think it is important to mention that at the age of 15 i got " pilonidal sinus " and underwent surgery to remove it but , i stopped checking it for the last 5 years and i have been  feeling it pain coming back for about a year or more , but i ignored it , whereas i am referring that i may have a case of prostatitis with infection originated  from the fistula  , i also doubt it may be prostate cancer , even i know the chances of having it at such age is almost nil , this is why i am thinking to take the test of " PSA "