I Have An Sgot Of 400, Negative For Hep., Dark

I have an sgot of 400, negative for hep., dark urine (rusty) in the morning, frequent urination at night x3. I have an ultrasound of the liver scheduled. I am an occasional drinker, like one a month. I am experiencing a lot of belching and heart burn and joint pain. I am fatigued. I did not fast prior to my blood draw. Could this be a mistake? Should I ask the doctor to retest prior to an ultrasound?