White Bread Allergy

It's really strange ... A year ago, I noticed I had breathing problems after a meal. A kind of extreme feeling of fullness. I went to my doctors, who diagnosed reflux, gave me some tabs but it didn't all the work. I just noticed that this happens only when I eat white bread ... Im confused ... could I have become allergic or intolerant to wheat or flour? Taking a antihistamene seems to slow down slightly. Is this possible? Im M / 39 without other health problems.

Yes. you might glutten intolerance / allergies, to name one of many things. You should talk again with your doctor to make sure you tell him that only happens when you eat bread.