There is a common trend here that I am noticing...Everyone is exibiting pretty much the same symptoms of heartburn, extreme stomach cramps, sometimes even moving to the back, nausea, vomitting...etc. Doctors are all eliminating this as GERD or acid reflux. Its ridiculous, no one has discovered what the hell is going on here. Either the problem is so simple that all one needs to do is make adjustments to diet or alternatively its so complicated that no doctor knows what is going on. The list of foods they say not to eat or endless and not very practical. "Dont eat these foods" and "dont get stressed out" the docotors say...but ofcourse none of them are in extreme pain ...their advice only works if they want us to go live in the mountains and meditate eating nothing but the air that surrounds us. This message is somewhat elaborate and I am sorry it doesnt help much, but know that there are others out there that have the same problem and you are not alone.
If I were you I'd ask the doc to refer you to a gastroenterologist. Also, I might recommend you find another doctor, since this one keeps putting you on heartburn meds instead of trying to find the root issue.
Did the DR take other tests blood tests etc. I would make him take more tests. Its possible its something else. Most likely not but with symtons like that I would make sure.
I have a similar problem, minus the diarrhea. The cough and the mucus/bile taste is acid reflux. I was 8 months pregnant when I got the cough doctors tried everything from asthma medications, antibiotics to codeine to no avail. Finally when I had my baby I had a chest x-ray, UBT, an upper GI with the Barium, and a full abdomen xray with all negative results.
I'm on the highest dose of Losec. The cough has gone away but I still get acid reflux and the occasional heartburn. Went off of Losec for 2 weeks as per dr's suggestion to see if it was doing anything and I got horrible heartburn. I've also changed my diet and am now dairy, citrus, spice, chocolate, caffeine free. It's been hard but it's made it better. I also take Gaviscon as it is better than Maalox. The liquid as bad as it is works better too.
I've recently gotten the whole hunger feeling you describe. Almost like my blood sugar is crashing.
I'm awaiting a referral with a specialist.