I ve had what I describe as a knot in my upper abdomen for over a year now. I m 57 and in generally good health, female. Have been diagnosed with GERD. Have had all sorts of tests: endoscopies, colonoscopy (though I m due next year), MRI (which revealed nothing other than 2 tiny cysts on my pancreas), abdominal ultrasound, endoscopic ultrasound (or something like that). My blood tests --- including liver -- are normal (tested every six months by my PCP). I exercise, am maybe just a few pounds overweight, don t smoke, drink moderately. Eat well. Symptoms are relieved temporarily by flushing out my system now and then with a laxative. Otherwise, my bowel movements are mostly soft -- not diarrhea, but soft. That s about it. My gastro dismissed said it s probably just IBS and told me to take probiotics (which I do). Thoughts?