Have them do a PH test for low acid in your stomach. It causes the same symptoms, acid reflux, heart burn, you name it. Do bad that they did not test me before I had my NF, or I may have never needed it in the first place. Everyone thinks of to much acid, I have never heard of low acid until my mom, my sister and my niece all take medication right before they eat because they have low acid and had acid reflux and sever heart burn. I was so upset when I found this out. Please look it up! I'm having my NF taken down in Jan.