Prolonged dull ache in lower left tummy/pelvis and lower left back. Ovary ultrasound was normal. Scared about colon cancer. No bowel movement changes?

ER rare. Colon cancer would be very rare at your age. Many other things can give you those symptoms. Why colon cancer v? Is there a family history ? See your MD. He/she can order a CT of the Abdomen or schedule for a colonoscopy to look closer. .