You could have a stricture which can cause all the symptoms that you are saying. I would ask your surgeon about it. It could be acid reflux as well. Since you had the sleeve it will make Gerd much worse or even cause it. I hope you get the answers you are looking for. They may want to do an upper endoscopy to see what is going on. If it is stricture they will have to perform surgery to fix it. If it gets worse, you may want to consider going to they bypass. I'm in the process of getting my surgery. I am choosing the bypass because I have Gerd now and can not imagine it getting worse.
wish you the best of luck.
Rebecca