I always had problems with my stomach in one form or another, but was just diagnosed with IBS last Fall after having urgency and D symptoms for about a year. About six months after having IBS symptoms increase, I experienced a 30 pound weight loss. I was working out at the time and eating better (I had cut out most fats), so I have assumed that the weight loss was my own doing. I noted, though, that IBS symptoms + weight loss may indicate other things going on and is one sign that the person may not have IBS. What could the person have, then? Should I aggresively pursue this with my doctor? or just chalk it up to good diet and exercise weight loss?