Emergency: How Much Pain is Too Much?

EMERGENCY: At what point should I be alarmed by how much pain I'm in?? How can I tell if I should go to the emergency room?? I woke up in so much pain! Google says the pain could be a ruptured cyst which needs IV pain meds and maybe even a blood transfusion for internal bleeding. Or it could be something else?? I don't want to go to the ER unless they're going to help me because I can barely stand to move. For context, this is as bad or worse than coming out of surgery after I had my tonsils and adenoids out at the beginning of April. I feel like my uterus has a ball of white hot barbed wire in it and there's a lot of compression and twisting pain too, and it's radiating throughout my lower back and but and belly and upper thighs.