I dont think its much to worry about. Its just a little heart burn that you experience during pregnancy even if you never got heartburn before. When my sister was pregnant she had the same thing. But she was fine. You also might want to check for other symptoms though, swelling of the feet, headaches, blurry vision...That is not good.If you get that I suggest you see a doctor right away. Bot if not, maybe some tums are ok for pregnancy, ask your doctor. Good luck and congratulations on your pregnancy!