I've chalked this up to the fact that I am about 50 lbs. overweight, and large breasted. (G cup ) When I lay on my back, I have no occurences. I've had to adapt to sleeping on my back due to sciatica and lower back pain, but sometimes during the nite in a deep sleep I'll turn over, and within minutes that I'm not on my back, I am flying out of bed gasping for breath because of acid reflux.
Am I right to assume that its due to my size ?