stretchy period blood tmi

Ok so this is rather disgusting but I use a period cup and it's allowed me to really get close with my own body lol. I've noticed that it's not just blood, but seems like it's mixed with extremelyyyyyyy stretchy mucus. Seems like egg white cm on steroids. I took my cup out standing up in the shower and I had a stretch of mucus that stretched all the way to the floor without even breaking. Does anyone else have this??????