Extreme breathlessness

Emma

No matter what I do I can’t seem to catch my breath. It’s making me really nervous because I usually can’t breath but never like this. I’ll be 37w tomorrow. I tried pooping to see if that’ll clear up some room but pooping just brought on Braxton Hicks and pelvic pain. Anyone else? Any tips? I’m currently standing with my hands in the air to open up my lungs n such but when I stop it comes back