After i pee !! i leak urine from my penis there no pain or bumps ! i shake my penis a lot and water still leaks and i felt a throbbing in my stomach?

Urinary obstruction: Almsot certainly you have partial obstruction of urine flow in your lower urinary tract. The most ccommon cause is a prostate problem, but there are other possibilities, such as a urethral stricture. This will only get worse until you deal with it, and eventually could be very dangerous (kidney failure, dialysis). See a urologist ASAP. Good luck!