I recall that we used to play a lot of girls basketball in shorts and T shirts. It was a practice where some girls actually on the team would play the classmates to get in some action.
I was wearing white shorts and white cotton panties and had a pad on as I was almost done with my period but for a few spots.
This one morning for PE I was sorta slow in getting dressed in my shorts and was in a hurry to get to the gym floor. I didnt pee first.
Almost halfways thru our practice I hadda pee so bad when I ran I was leaking. I had drops of pee drippin down my legs leaving spots on the floor.My pad was soaking up some of the pee and stopping an all out flood all at once or a long spurt showing up.
The female coach and teacher would stop the game, get a towel and mop up the spots on the floor thinkng it was just sweat drops.
By the end of class I had about half peed my panties and got away with it as most all my pee ran down my leg and got my crotch wet a little.
Whew, so after class we put on our class jeans and tops and got dressed. I tossed my wet panties in the trash.
It was also a good thing, in our school when the girls had PE the hall and walkway to the gym floor was closed to all cept teachers and certain people. Thus no boys could watch us, and see our boobies floppin (lol) and of course any accidents thank God.