Hi ..bit Embarrasing..im On My Period And Just Passed A

Hi ..bit embarrasing..im on my period and just passed a chunk of flesh ...i do usually get bloodclots but this isnt a clot it doesnt disolve ...ive had abad period pains this month but am generally stressed ... what is this fleshy thing? Its about 2 inches and pinky fleshy and dark dark red . Im 37