I TAKE A PERCOCET AND A VALIUM TOGETHER AT BEDTIME.

I TAKE A PERCOCET AND A VALIUM TOGETHER AT BEDTIME. I HAVE TYPE II DIABETES AND RHEUMATOID ARTHRITIS AND I AM 80 YEARS OLD. IS IT OK TO JUST DOUBLE UP ON MY PERCOCET IF I RUN OUT OF VALIUM? MY DAUGHTER-IN-LAW IS CONCERNED BECAUSE SHE DOESN'T THINK MY HEART IS PUMPING RIGHT BECASE I HAVE SOMETHING CALLED PEDAL EDEMA AND SHE SAYS I SHOULDN'T DO THIS.