This is what, one doctor said was my problem. His explanation was that cannabis is a relaxant and it relaxes your stomach muscles. He said that from smoking a lot, my stomach muscles were always relaxed and my food wasn't being processed properly.
Told him, he was full of shit, because I hadn't been eating anway

I know what it was from, it was from stressing out for 6 or so years, building a new house, having a shit boss and generally treating my body like shit. That and a Hiatus Hernia, led to many more ulcers then "6" and reflux leaking into my lungs.
The first doctor was a complete wanka and just wanted to give it to Sal my missus. Thought a dreaded hippie like me shouldn't have a girl like that. So the fuckhead (excuse the f-bomb) treated me like shiza.
He tried to diagnose me with something like this.
http://www.practicalgastro.com/pdf/Sept ... rticle.pdf
I can tell you all it is BS and once I chilled a bit and started to feed myself properly it all went away. I still get a bit of reflux, but have always anyway.
So yes this is crap.
Sorry f@#$ing rant.