Extreme Tiredness

I wonder if anyone has experienced the same or can provide some advice..

I’m currently 16 weeks and the tiredness that I’m experiencing is insane! I find myself waking up after being unaware that I’ve fallen asleep. If I let myself, I could easily sleep all day and all night and still be tired and struggle to keep my eyes open! I’ve had my bloods taken and everything came back normal so I’m at a loss.

Any advice or personal experiences are welcomed.. please!