recently had my yearly physical, and the labs show: low TSH, low B12, low Vitamin D, slightly high LDL, and everything else normal. I have been complaining for a couple years of extreme bloating, gas, varying bowel movements from loose to hard, fatigue, and jaw soreness. Also, I have been diagnosed with GERD. Can anyone think of a possible diagnosis that might include most if not all of these symptoms. I realize that all of these things could be coincidence, but it has all come about rather suddenly. I'm a 31 year old male, who doesn't get much exercise, but is in pretty decent shape. I also smoke a pack a day. (I had a chest x-ray and lower abdominal ultrasound performed two weeks ago, and the results were normal). Any and all ideas are welcome. Thank you.