I know what you are going through and you are not alone. I have been dealing with swallowing issues for around a year and have finally taken the step to see a GI doc this coming Monday. The only way they can determine what is wrong is for you to get an endoscopy that way they can see the inside of your esophagus and stomach. My doctor is probably going to be scheduling one for me and I know what the fear you are feeling the Fear of the Unknown.
If you are on PPI's they take a while to kick in. But to put your mind at ease go to a GI doc so that they can perform the proper tests to give you a correct diagnosis.
Hope you get well soon