Skin from vagina

Whilst on my peroid I had two pieces that look like skin come out from my vagina. They are about an inch long and have some blood clots in it. Im guessing that it is some type of skin but have no idea what from and Im a bit worried. Any ideas what this...

could be?

most likley it wasnt skin
it would have been yes, the lining from your uterus
or in other words...a pretty big blood clot

its the lining of your vaginia. thats all it is.

Yeah it's the uterine lining. Thats what you shed when you get your period. The blood clots are just a gross additive to your monthly flow experience.