Suggest Treatment For Gray Colored Stools, Headaches And Varying Liver Enzymes

I have been having problems with my vision in my left eye along with headaches, dizziness and nausea. Went to the eye doctor and was told my vision is perfect. I was in a car accident August 2013 and since then I was taking a lot of Aleeve and tylenol on a daily basis. Now I am having problems with my liver enzymes going up and down and gray colored stool. I have had the gray stool twice in the past three weeks.