Is this normal?

Hi! This morning I had really really really bad cramps. Like I was sobbing for over an hour before I could get strength to move my legs (my cramps are mostly in my bottom and in my back) Nothing would relieve them. I took pain pills and tried my heat pad which usually works but it didn't. I got in the shower and let the hot water run down my back. A few hours later after the cramps eased up I went to the bathroom and this was is my pad. I seen tissue come out before but this is alot larger than normal! Any insight or opinions would help thankyou so muchhhhhhh ! Can this be why my cramps are so bad?