Exausted.. From doing nothing?

Sara
37 wks 3 days. And I literally walked up my stairs and had to sit down. Then after I caught my breath I got up and started vacuming for about 2 mins and got exausted again! Is this normal? Lol I'm not over heating and I'm drinking plenty of water and eating. How will I get anything done with me being like this and a super sick husband. :( lol