Have had a pain way down in pelvis for over a year. If it was cancer wouldnt something already happen?

Maybe. You need to see a health care professional to discuss this pain and find out what it's cause is.
Do not wait. There is no reason for one to live with pain for over a year. It probably is not cancer, but could be a treatable infection and treatment may relieve pain. Please consult your doctor.
May not be cancer. Could be many things. Adhesions from surgery or infection can do this, also pelvic inflammatory disease, and salpingitis. Check this out with your doctor because the longer it goes, the worse it could become.