Re: how to test for cervical cancer?
You have to have a pap. It is not diagnostic in itself, but it is the screening test, and if any cellular abnormalities show you may go on to other tests, including colposcopy (microscopic look at the cervix) and pinch biopsies. Biopsies are the standard of cervical cancer diagnosis (and most other cancer diagnoses).
Abnormal vaginal bleeding can be associated with cervical cancer. If you have abnormal bleeding you definitely want to see your gynecologist to find out what is causing it.
Thanks to pap screening, most cervical cancers in the US are caught early and completely cured.