This feeling of something stuck in your throat warrants an upper GI endoscopy
especially because you have been on treatment for GERD
. Long term GERD can lead to stricture formation and difficulty in swallowing. I dont mean to alarm you but you should consult your doctor immediately and have him schedule an endoscopy for you.
Also you should try and improve your diet - Dr. pepper and baked chips are going to make your GERD worsen. You should avoid aerated drinks, spicy food and mint.
Hope you get well soon.