I've had horrendous acid reflux for the past 3 months and to tell you the truth, Tums made it worse for me. Tums always gave me horrible stomach aches and gas. I was actually put on prescription prevacid, but the doctor wasnt concerned when I went for my pregnancy test, but I doubt they would recommend that for just heartburn. Here's what I do to try to keep it under control. No acidic foods or drinks (orange juice, apple juice, pineapples, etc.