HI - I AM A 70 YEAR OLD FEMALE IN

HI - I AM A 70 YEAR OLD FEMALE IN GOOD HEALTH - DO TAKE MEDICATION FOR HIGH BLOOD PRESSURE AND CHOLESTEROL. I HAD A COLONOSCOPY 10 YEARS AGO AND AM DUE ANOTHER ONE. MY MATERNAL GRANDMOTHER HAD COLON CANCER AND DIED AT THE AGE OF 76. THERE IS NO OTHER CANCER IN MY FAMILY. I HAVE NO SYMPTOMS OR PROBLEMS IN THAT AREA. I AM AFRAID OF UNDERGOING ANESTHETIC FOR THE PROCEDURE. IS IT REALLY NECESSARY FOR ME TO HAVE A COLONOSCOPY? WOULD ANOTHER PROCEDURE SUFFICE? THANK YOU.