Apologies for posting so late, i know this is unlikely to help the OP but it may help other sufferers.
When eating out ask the restaurant let then know you have an iffy stomach, dont try to go into detail, just ask them to prepare your food with no chillies (dont bark at me please let me finish) tell them you need it making like for a baby, this they will then understand
As a long term GERD sufferer i often do this in Thai restaurants over here, which is what my Thai friends have told me to say, works everytime