What Causes Dizziness Along With Shortness Of Breath?

I was takin to the hospital for light headedness and shortness of breath. I was feeling a slight discomfort in my chest. After testing my heart it came back fine. I left the hospital the next day but still feel slight shortness of breath. About a month ago i was sick with a chest cold for more
Than 10 days. I read that i could be experiencing a restricted airway. Is this possible?