For acid reflux I found that reducing carbs helps me. Antacids didn't work for me, you actually need some acid to help you digest your food, I got carried away eating tums and it actually made me worse. Of course everyone is different, but if you are using antacids and/or reflux meds and it doesn't help it might be worth a try.
Heartburn/acid reflux is often the result of your stomach not producing enough digestive (hydrochloric) acid. This is why taking an antacid, like Tums, makes it worse; you already have an acid deficiency and you just neutralized what little you have remaining by taking an antacid.
A simple test a naturopath/homeopath uses to determine if you are producing too much or too little digestive acid is this: when you have an attack of heartburn, drink 1-2 Tablespoons of ACV. If your heartburn gets worse, you are producing too much acid. If you get immediate relief, the cause of your heartburn is that you don't produce enough digestive acid.