I am female, age 61 with a history of smoking. I have been extremely tired and lethargic for a few months, my stools have become very light in color, very wide, float, and I have pretty awful back pain, mid-left. Awful taste in my mouth for a few weeks no matter how many times I brush my teeth. Do not have much of an appetite, and food doesn't taste very good either. I have had numerous ongoing episodes of nausea and have vomited at times. I get chills then sweats on and off, but more often these days as I am resting more due to my fatigue and that is when it happens. I am having a CBC and lipids blood test tomorrow morning. Is that a good testing indicator for my symptoms?