Exhausted?

So don't get me wrong.. I've been exhausted my whole pregnancy.... but the past few days have been TORTURE. I've woken up around 8, and by 2 I've fallen asleep again for another 3-4 hours, then back in bed by 8/9... im so exhausted I am beginning to feel like there's something wrong... did anybody else experience this in the last few weeks before labour? (Currently 39+5) I'm sure it was supposed to be the other way around and I was supposed to have a big rush of energy! Thanks anyone who reads/ advises 🙂