Sounds like you've discovered one of the quirks of band adjustment - fills can take 2-3 weeks to kick in.
It is theoretically possible for food to block the stoma and stay there, especially if it is very fibrous. Things like corn husks, dried coconut, celery strings, sausage casings, etc. take longer for digestive enzymes to break down, can accumulate in the stoma over time, and would have to be scraped out during an upper endoscopy if they refused to move. But most types of food will eventually break down and pass through into the lower stomach.
I've had stuck episodes last 4 minutes to 4 hours. Sometimes the discomfort and swallowing difficulty afterward isn't due to a blockage. It's just that your esophagus and stoma are super irritated and instantly object to any more food. If you keep eating, you will just perpetuate the problem, so it's best to stay on liquids for 24 hours, then slowly transition to purees then soft then solid food. If at any point during the transition process you start having problems, go back to the previous stage for 24 hours.
Since we're coming up on a weekend and it can be hard to get bariatric medical attention on weekends, I suggest that you call your surgeon's office today and tell them what's going on. If you can drink liquids, you're OK, but you can't go on like that indefinitely and as Lisa said, a tiny unfill could make all the difference in your comfort without compromising your restriction.
Jean McMillan c.2009-2013 - Always a bandster at heart
author of Bandwagon (TM), Strategies for Success with the Adjustable Gastric Band & Bandwagon Cookery. Bandwagon for Kindle now available on Amazon. Read my blog at: jean-onthebandwagon.blogspot.com