I'm noticing a pattern with others in regards to acidity. Dehydration is definitely a trigger for both GERD and anxiety. Make sure you are getting the amount of water your body needs per day. It is important to choose a high quality water. Distilled, some filtered and even some bottled water contain no minerals at all. Evian, Perrier, San Pellegrino and other mineral waters will not only supply your body with minerals it could be lacking but will also buffer acids as well. Gerolsteiner is high in Calcium and will help if your issue is related to a calcium deficiency. If your diet contains sufficient dairy etc try waters that are lower in calcium since elevated calcium levels can lower magnesium. It really is a lot of research and trial and error. I posted a video for a recipe for homemade mineral water if you're on a budget. You can also look for a water pitcher that leaves the full spectrum of minerals in the water (Clearly Filtered, Aquagear). If all else fails, drink straight from the tap. Acidity is a clue that our bodies need minerals and tap water is a convenient way to build them back up.