I cannot breath!

Omg..I'm totally out of breath. I've been having trouble off and on for a couple days now but today it's really bad. Even sitting..doing nothing, I'm fighting to breathe easyand I'm getting lightheaded from it. I have stuff i need to get done around the house but can't even walk to the bathroom without taking a break. I'm 37+2 weeks pregnant. Is this temporary or will i be dealing with this until delivery..