What do I do to relieve my heartburn?? I don't know what foods are setting it off? Or is it just part of my pregnancy hormones fluctuating etc?

I've been told about "Tums" but they say not to be used in the first Tri so i won't go near them.

I find if i drink some water that helps but not really...iykwim!! Just relieves it for a second or two.....

TIA