E.P.
Stress can definitely trigger heart burn. Pregnancy or hormonal times in your life too, can be challenging. I had a few awful bouts when I was pregnant with my daughter. Also, different foods can trigger it so keep an eye on what you eat. Some foods that I have eaten over the years have recently been giving me a lot of heartburn (i.e. baked ham/some lunchmeats, hardboiled eggs). Coffee and acidic drinks can be a culprit, so can fatty foods. Also, be careful about what you eat in the evening. Stop eating anything 3 hours before bedtime, especially if you are a nighttime snacker/binger. If you are experiencing a lot of heartburn, start getting into eating 5- 6 smaller meals for a while. (I just went to the dr. and heartburn was one of MY complaints - now I have to give up my coffee!)
I take an occasional Maalox tablet - nothing more at this point. I just am being more conscientious about what I'm eating and I'm exercising more. It has definitely helped.