One of the, er, joys of pregnancy for me seems to be the heartburn. I usually don't get it, and, while pregnant, it has been keeping me up for an hour or more once I lay down to sleep. This happened to me last time, too, and I remember taking shots of Apple Cider Vinegar (because diluting it in water just made the taste last longer), which worked but tasted awful.
So instead of sleeping sitting up (which I considered, even though I have an entire trimester remaining), I asked some local Mamas for their ideas as to what I should take that did not include artificial coloring (Tums) and were possibly without sugar (Tums) or aspirin (Alka-Seltzer).
I got the following responses, and am feeling a LOT better after trying a few out.