I am petrified and crying i have gallbladder polyps for over 6 years with one that went from 4mm to 6, 5 mm in that time . i am scared its cancer?

Then why you waited: Yes 6.5 mm gall bladder will have slightly higher incidence of being cancer 7.1 % compared to female, don't worry get the gall bladder removed and stop worrying, it is a low risk procedure.

Agree with Dr. R: Crying is understandable but not helpful. See your doctor for a proper treatment, which may involve removal of gall bladder. Wish you good health!