I was having some stomach problems, acid reflux, and then got very constipated, hence the stomach pains. After giving me a stool softener my doc suggested I have a sigmoidoscopy as I am 53. The doctor was unable to complete the exam, too painful. He tried for 30 minutes and every time he tried to get around the 2nd bend I got these bad cramps very low in my pelvic area. He thought maybe he was pressing against my uterus. I have a retroverted, tilted backwards, uterus and large fibroids. He wants me to have a colonoscopy but after this I am afraid. Any one ever have trouble with sigmoid test ?