A childhood belief about periods

when i was about 10 my friend brittany told me about periods. But i thought that you only bled once a day for a few days, not all day and night. My friend channing had two older sisters and we stayed up late with them one night. they thought I was asleep and the older girls started tlaking about how thier periods hurt and stuff. I thought the blood comming out would burn and sting like a cut. also at channings house one time i went to use the bathroom and there was a thong in the sink and it had blood all over the crotch. I had never seen a thong before so i was like "channing is that what your sister wears for her period so it doesn't bleed thorugh?" and she was like no you idiot thats just her thong underware.... me and channing also used to call each other on walkie talkies across her huge house and talk about how bad our periods hurt like ladies did on the phone. SO stupid.
I was like totally okay with tlaking to my friends about it, but so shy with my mom i hid it from her for 2 months. I also remember when they separated the girls and the boys from each other and made us watch a special video. during the video this one girl rachel who was really popular and mean asked if girls can get pregnant from a vibrator. no one knew what she was tlaking about and the teacher took her out of the room and made her sit in the hall. after the video was over we went out to recess, and the boys in our grade were all like "god you won"t believe whatwe had to watch it was SO gross, what happens to boys is really really bad." Us girl's were like "no TRUST US girls have something wayy worse!" haaha