I have had the same problem for a couple of years. I am on constant medication which I take in the morning. Also take a tablet at night if I have eaten late or eaten anything which I know will set it off.(I live in New Zealand so won't give you the name of the drug I am on).Try and do a bit of walking before you go to bed to settle the contents of your stomach.Also ,my doctor advsed sleeping on your left side as it helps to drain things and it does work.Make sure you're on a good prescribed drug not just something you've bought over the counter.Have never heard of reflux causing cancer.My father had same for over thirty years.You may find you have a bout of it for a few days and then it goes away again, but I do think the answer is on constant medication. Good Luck from far away!