So sorry you've got this Jiffy. I sleep on a wedge which is often advised, so gravity helps keep the acid down. I take 30mg lansoprosole too, morning and night. It does help but i hate taking them. The info about elastin is interesting, I didnt know that. Also many people with acid reflux have hiatus hernias and these often develop in people with breathing difficulties as shallow breathing tends not to use the diaphram muscle, so weakening it.
I have seen some yoga exercises online which are meant to help but i havent tried them yet.
Although I have severe COPD, I find the reflux more disruptive to my life which seems strange.
You can find wedge pillows online, not cheap but I wouldnt be without mine, it really helps in the night. And its VAT exempt when you have a medical condition.
Hope this bad phase passes soon.
Good wishes, jean