Why do i pee when i masturbate?

I need help , cuz i think its not normal to pee after you masturbate (lol is it called pee-gasm lol ok no?)it is obviously not squirt or something lol😫, and ive never done this before , also im still a virgin and it all started when i tried to rub the opening of my vagina ):

Also i pee before masturbating sooo idk now

It is so inconvenient because i have to wash my sheets after

Any tips for controlling it?