feeling of a piece of food stuck

I have had acid reflux for a long period of time.I was put on Nexium which worked wonders for a year and a half.
then the nexium stopped working for me.for 3 months it was so painful when i ate.I literally vomited every time i ate.
I vomited 3 and 4 times a day.I talked to my pcp and nothing was done.2 weeks ago i was put on dexilant which worked wonders i can eat almost any thing!
However there is a catch.for about a month or 2 i have had this feeling after i eat, sometimes not all the time,i have a feeling of a piece of food stuck on the upper right side of my throat.
Its not painful just Very Irritating.Like tonight i had a piece of toast and i feel this sensation like there is a very small piece of toast stuck in my throat and i cannot get it to go down.
i swallow ,and i feel it going in a downward motion on my throat and very slowly stick itself back on the inside wall of my throat.
I already had a barium swallow,my pcp looked in my throat didn't see anything,didn't feel anything,what could this be?I am so frustrated!
I had my tonsils out 30 yrs ago,so i know its not that,I have had an apt set up with a gi specialst for 3 months and i have anther month to go before i see him.
I have an ultra sound set up tomorrow of my throat.I see a E.N.T. in 4 days.
This feeling that i have at times of food stuck in my throat comes and goes.maybe 4 meals a day it might happen twice,sometimes none,then othertimes 4.
I have tried to figure out if its certain foods,but there is no pattern.
If there was a cyst,tumor of cancer wouldn't it have shown up on the barrium swallow?
I use to smoke.I was 17 when i started and became a heavy smoker at 25,and continued a heavy smoker till 39.(heavy smoker maybe a pack and a half a day,or a pack a day)
i quit smoking 8 weeks ago(before this food stuck in the throat feeling.)This feeling i had as i was typing of food stuck in the throat is almost gone(it has taken about 1-2 hrs)
It comes and goes,its weird.can a tumor or cyst show on a barrium?I hoping its not cancer.

Hi Gettysyork,

I still maintain that you're experiencing irritation.  You are under your doctor's care, and believe me, they wouldn't be playing around with PPIs if they had any thought that it might be something more serious than reflux.  It can take months to heal esophagitis--it's not a quick fix. 

Did you see my response to your first post, regarding eating?  I included links to very useful information.(https://www.healingwell.com/community/default.aspx?f=45&m=2223226&g=2224908#m2224908)

I think you would benefit from eating a Nissen-type diet, taking small bites, and chewing, chewing, chewing your food until it's liquid and no longer abrasive.

Hang in there!

Denise