Hello, this is Dr. David. I have read your question and am ready to help.
I am sorry you are having severe shortness of breath after you eat.
sometimes after big meals, your stomach expands and this puts pressure on your diaphram and it can be harder to take a deep breath after large meals.
have you had pulmonary function testing done by a pulmonologist to check for narrowing of the airways and reactive asthma
? I take it that the lung specialist performed a pumonary function testing for you with and without bronchodilators (where they give you an inhailer and retest your lungs to see if your lungs improve)
you should have that pulmonary function testing after a meal and see if they can see poorer lung function after you eat.
after you eat, also all the blood can flow to your stomach and so sometimes it can be a bad idea to exercise or strain your muscles after you eat.
are you eating big meals?
have you tried eating smaller meals?
hvae you had a CT scan of your lungs?