For two days I have had trouble getting a deep breath.  The more I move around and do, the harder it is to get that good breath.I also have a feeling of fullness.  I can only eat a tiny bit because I feel so full.  Im not in any pain, just very uncomfortable.  What could cause these feelings?
Thanks for your question on Chat Doctor. I can understand your concern. Possibility of HERD (gastroesophageal reflux disease) and related bronchitis is more in your case. HERD is due to laxity of gastroesophageal sphincter. Because of this aspiration is seen in the wind pipe. And it can cause breathing difficulty. HERD cause stomach fullness, tightness, gaseous distention etc. So better to start proton pump inhibitors and prokinetic Chat Doctor.  Avoid large meals, instead take frequent small meals. Avoid hot and spicy food. Consult pulmonologist and get done PFT (Pulmonary Function Test). You may need inhaled bronchodilators and inhaled corticosteroid (ICS). Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.