Can’t breathe

Jen • Wife & mommy to 3! Happily remarried and Preggers with baby #4 🥰

Ok so I’m currently 37+2 and I literally feel like I can’t even walk a few feet today without being COMPLETELY out of breath and needing to sit down. I feel like the baby definitely dropped a little over a week ago so I’m not sure why I can’t breathe today. Should I be concerned?