Elevated Alkaline Phosphate Enzyme

I have had elevated liver enzymes a couple of times and then when I go back to the dr they are normal. Have any of you had this issue. Also the week before the bloodwork, I was sick with what I thought was the flu, stomach ache, low grade fever, but no throwing up. I do have diverticuli and I believe that was the problem. A couple of days later and advil, I was feeling much better. The advil may have been the issue with the ALK. Anyway, got an appointment with the oncologist on Friday. He took blood this past Monday. Just wondering if any of you have these issues.