Hi,
I had terrible heartburn with my first two pregnancies and assume I will with this one. I tried to eat little and often rather than large meals which seemed to aggravate the situation and definitely nothing too spicy. My doctor in the UK recommended Gaviscon, but I don't know whether you can get it here. My friend also used bicarbonate of soda (used in cooking), never tried it myself, but she swore by it.
It doesn't last forever, though right now that's proabably no help. Good luck
Jools