Hi Scarlett!
I've had this problem on and off for many years. The latest "over the counter" remedy - RANITIDINE - works better than anything I've ever tried. You can buy it in Tesco or Morrissons with their own label (just called "indigestion remedy") or else go to a pharmacy and pay loads more. It's a "take one and mended in half an hour" process. It works in a different way to older preparations in that it stops the production of excess acid rather than trying to neutralise it.
PS Wilkinson's version is the cheapest!
Good luck,
Tony