Ok, for the burning, you could take something like Pepcid AC or Maalox and see if that helps. It could have been the overeating and the laying down afterwards...that usually is never a good combination. I understand that going to the Dr might not be an option for you right now, but if this continues to happen, you might really want to consider it.
I also wanted to add that staying away from known triggers for excess gas such as onions, cucumbers, beans, green peppers, cabbage, soft drinks (coca-cola), apples, bananas, prunes, melons, eggs, fried breads such as donuts, and pastries, artifical sweetners, and milk products.
Digestive enzymes have been shown to help reduce the gas that some people have. Beano is a commonly found product that contains a digestive enzyme that might help you. Other digestive enzymes can be found at your local pharmacy department such as those containing lactase.
You can always take some Gas X or Simethicone for the gas, as well.