I get really bad heartburn sometimes, and one day it was sooo bad that I was throwing up. So I went on line and did a search for instant heart burn remedies, and believe me, there are a ton!! What I did that day, was 1 tbsp of Vinegar. It was the worst tasting and burning as it went down, but like 5 minutes later, it was soooo much better. Here is the site that I went to:
http://www.otan.dni.us/webfarm/email.../heartburn.htm
I've heard A LOT of good things about Apple Cider Vinegar!
Good luck!