How to know if your difficulty in breathing caused by low potium?

It might be easier to buy a potium supplement at a store that sells vitamins, and also drink some extra fluids. Get a low dosage of the supplement (around 200-250 mg) and take it with each meal. If the problem is caused by low potium in your diet, you will see improvements in a couple of days. If you take supplements and drink extra fluids and still see no improvements, then its time to see a doc.