[irregularverb37]

I recently masturbated and when I ejaculated, I felt pressure at the base of my penis, almost in my scrotum. The pressure was slightly painful, but not something that would automatically make me scared. A good amount of ejaculate came out, but I'm thinking that the pressure I felt at the base of my penis was caused by ejaculate that, for some reason, didn't come out. I hadn't masturbated for a week prior to this so a good amount of semen was stored up. Does anyone know what this could be? Should I seek medical attention?