Hello I have been having multiple issues. The concern comes because all of my lab work shows normal, but I have all of theses symptoms. Irregular heart beat, sweats, tremors, upper back pain, excessive flatulence, poor memory and confusion, irregular bowel movements, aching. Have all of the symptoms of someone with a thyroid issues. Heart, Throat, Stomach, and Nuero has been checked and everything is negative. What might this be.