A few months ago I had a horrible pain in the tailbone area. Pain medication did nothing for it. Went to ER, was told it was sachrylitis. Antibiotics made it go away. Then came pain in lower left abdomen/left hip that radiated. ER this time thought it was diverticulitis. Having CAT scan next week. Since then whenever I sit, especially on toilet. Indian style or upright at all, i have extremely bad cramping, almost burning pain across lower back and in hips. The only thing I can equate it to is back labor pain/cramping. Could this be intestinal or something else? I'm in agony! Thanks in advance for your advise.