Severe pain in lower left side and back. been over a week, went immediately to OBGYN, thought i had a cyst in female area, had ultrasound and vaginal ultrasound that found nothing, then went to family doc and he did a ct scan that came back normal. gave me antibiotics and Motrin for pain and said to stay on them for a week to see if i might have an infection in my colon like diverticulitis. however when i read about diverticulitis it states i should be vomiting and have fever, but i do not. after a week if i am not better and pain still there he wants me to have a colonoscopy. i am 52 so i know it is time. but could this be any other thing to consider?