shortness of breath can be normal but if you are short of breath and you cannot get your lungs to expand after a while ..then go to the er or labor & delivery. I had this problem and was told it was normal I hadn't gotten any relief after 24 hours of straining my lungs. I went to the er and it turns out my asthma was acting up and the baby had turned head down. The combination of both made me really miserable.