I used to do masturbation regularly and one day during the climax of ejaculation i stopped, since after tht day semen also comes along wid urine thr?

Prostate gland: If you do not empty your prostate gland through ejaculation then nature finds a way to get the old aged seminal fluid out to make room for fresh fluid. Fresh fluid is necessary to keep sperm alive. This is normal.

IT IS PROBABLY NORMA: If you have not had unprotected sex than what you see in the urine is normal masterbation will not cause any i;; effects at your age but if there is any symptom like pelvic pain, burning or pain during urination, than consult your doctor.