Gut wrenching

*Dimple* • TTC #1 for 4.5 years. Diagnosed with endometriosis 12/28/15. Conceived naturally October 2017
So today I started my period and I started spotting ten days ago. Yesterday I had pain in my behind as if someone was trying to pull my insides out of my butt....I know but I have clue how else to describe the pain. Today since my period started that pain is unbearable and I want to cry and go into fetal position. I feel like my insides are being seared by something hot. Sitting makes it worse. Pain meds help shortly. I am pretty sure I have endo and its related to my GI tract. I have also had to poo three times in two hours! Not to mention the possible endometrioma. Can't get another ultra sound until December....