Pain after masturbating

As the title states, I get horrible painful cramp attacks that last for a few minutes when I masturbate usually the week or so before my period is suppose to start…. Does anyone else get painful cramp attacks from masturbating when it’s close to your period time? I usually use a vibrator, nothing internal, and I can feel the cramps lightly start when I know I’m going to start playing with the kitty and by the time I’m done I’m in extreme pain for a few minutes. I only notice is when I’m close to starting my cycle of hell :/