How does one correct their eating in order to not breathe intoo much air? is it possible that tmj symptoms, shortness of breath and packed stomach might be interfering with the breathing?

Gastric Pain: Please listen to your body. Slow down your eating. Chew food thoroughly and slowly. Put your fork or spoon down between bites. Talk to someone you are eating with so that you also eat less and eat slower.

No great answer: East slowly, and do not have conversation while you eat. We all injest air during eating, but if you do not speak and have conversations while eating you will minimize the air intake.

Habit to break: Your problem is not uncommon! it is easy to inject air when slurping/sipping soups, coffee and other liquids. The key is to make sure the food and liquids is touching all the surfaces of your tongue and mouth before swallowing..No air should be present. Be patient this will be a hard habit to begin.

Not likely TMJ: The only way I can imagine TMD related to breathing problems is that if you can't open wide and if you are a mouth breather.