Is it normal to feel awful 37 weeks

Regs

I'm 37 weeks and 1 day. I feel like absolute crap, the last 4 or 5 days. I've been sleeping in for hours and hours and not being bothered to do anything and I then even have a nap in the afternoon. Is it normal to have gone from great energy levels to absolutely none? Does it mean labor is getting closer or is it just my body giving up on the whole idea of pregnancy? Cause that's how it feels now.