Help! Possible miscarriage? TMI

So I started taking the pill a couple months ago and I haven’t been taking the week to start AF however, sometimes I still have it and this time around my period everything seemed normal as usual except the cramping was excruciating with a medium amount of bleeding. I went to the bathroom to change tampons and was feeling very constipated, then next thing I know I passed a very large chunk of blood and mucus and something that looked like skin. It’s scaring me that it was a miscarriage and I really don’t want to go to the dr and here that but I know I should. Has anyone experienced this before??? I do have a history of ovarian cysts