I had terrible heartburn and acid reflux with my first two pregnancies but have managed to avoid it so far this time. The only thing that really eases it is to stay away from that yummy greasy junk food and to eat frequent healthy snacks.
Oh yeah it tended to get worse for me if i had a big pig out on hot chips or anything pretty much greasy and then didn't eat for a few hours after it. It made me bloated so i didn't want to eat and then the heartburn was double trouble.