In my lab results, I have a carbon dioxide level of 28, which is marked as "high." I also have a borderline low creatinine at 70. Should I be concerned? I am a 50 year old female, 5'5", 225 pounds. (yes, I have a lot of work to do...) I take lipitor, levoxyl, bystolic (for benign PVC's) omeprazole and a bio-identical blend of estrogen/testosterone/progesterone. My hemoglobin a1c is 5.9. Thank you.