Have you thought about having your iron levels checked? I had terrible shortness of breath when I was iron deficient. That was one of the first symptoms. As I didn't know what it was, I didn't get it treated and it lead to other symptoms such as dizziness, extreme exhaustion and funny vision.

Just a thought. I hope that it is nothing serious and that it settles down soon for you. Have a chat to your caregiver - they will let you know if there is anything to be concerned about