Hi and Welcome!
As you already know, none of us are medical professionals but we can share experiences and opinions. I had no clue on this so did a bit of searching. What I did find is that there can be so many causes for this type of pain! Anything from IBS to diverticulitis, ovarian cysts, pinched nerve, menstrual problems, and the list goes on.... But you did the best thing by getting an appointment with your doctor.
If your pain is as unbearable as you described I would call the doctor back and explain the situation. You shouldn't suffer when you can at least get some relief from the pain until they can pinpoint where it's coming from. Ask if they can work you in or call if there's a cancellation. You might let them know that you are considering the ER for some help and that wouldn't be a bad idea anyway. You deserve some help with that sort of pain level and right away.
Please keep in touch,
"Knowledge is knowing that a tomato is a fruit, but Wisdom is knowing not to put it in a fruit salad."
(> <) Co-Moderator Fibromyalgia & Chronic Pain Forums
Fibromyalgia, PTSD, UC, Diabetic on insulin, collapsed disk, arthritis scattered around and a few other delights.