Im Having Persistent Stomach Pain And Nausea. I Have Already

Im having persistent stomach pain and nausea. I have already been diagnosed with GERD but it has never lasted this long before. i having almost constant reflux for the past 5 days now and Im having trouble swallowing and I can feel food grinding down my esophagus. I had Candida in my esophagus earlier in the summer but that was cleared up and now the medicine I use for that is not working this time so i do not believe it is the Candida again. Also, Im having trouble taking deep breathes as it causes a dry pain in my chest which is also tight. Im a little worried about my immune system. I eat right and I exercise but I keep catching something. Im afraid it might be Pancreatitis or something like that. Do my symptoms tell you anything?