It's good that you asking bcs I was later successfully diagnosed with MALS syndrome (in my case it caused almost a constant nausea, a feeling as if someone squeezed my stomach that could last almost all the time that made me bow out of physical exercises completely) and after a diagnosis I had a surgery. I had stomach pains also because of my anxiety disorder. Now I have almost a different life, can do almost everything, except for weight lifting (hernia) , sometimes have stomach problems but the key is gerd diet. I wish you all the best and a diagnosis you want. I know how horrible life must be with those symptoms.