I once ate popcorn and had a shell/hull stuck in the back of my throat and I was coughing and felt that maybe I breathed it in. I tried to cough it out for days and even weeks and went to a lung specialist and right before I did a bronchoscopy someone mentioned they had reflux symptoms causing a chronic cough. I checked that out and indeed it turned out that the pain in my lung and coughing was at that point from acid reflux. (which can be caused by coughing so much...) I kept coughing to get out the popcorn from my lung, but it was the coughing that caused my problem at that point. Stopping to try to cough it out and acid reflux medication resolved that problem and it turns out I did not have any popcorn in my lung.
I bring this example to say that if you've done tests to see if there is anything stuck in your stomach or intestines and these have come out negative, then you should try to forget about the dough and just address the symptoms you have now. It could be that you couldn't digest it easily because of a prior issue. So address the issue of trouble digesting. There are some issues that can help with the bloated feeling. No carbonated drinks. I find drinking some pomegranate juice when I feel that way helps the digestion. Try probiotics. Eat small meals (as you say you do), and move around after eating - stand and shift your weight from toe to heel on alternating legs (in this way slightly shaking down your stomach from your esophagus). Tap the top of your stomach. Both these things might help you burp and release the pressure. Don't slouch, especially after eating, and roll your shoulders/stretch your chest so you relieve pressure on your stomach. Stop caffeine (coffee and tea) and chocolate - because these cause a loose sphincter (LES), which allows the stomach to move up into the esophagus. Hope this helps.