I had a pre-existing reflux issue which has been greatly reduced/resolved after being banded. That being said, occasionally I find my band tighten up and have had to be de-filled because I am experiencing heartburn and some reflux at night.
As a rule I don't eat anything spicy past lunch time. At night I eat a very small meal. I don't eat at least 2 1/2 hours before going to bed and I drink an 8oz glass of Water 1-1/2 hour before going to sleep to make sure my small pouch is empty.
See your doctor. If you take care of these things early on they shouldn't develop into major complications.