Exhausted

First trimester I was tired at the start.

But then it all got easier and I would only get tired in the afternoon 4pm onwards

Now I’m 22 weeks and the last two weeks I’m just so so exhausted. All the time. I can sleep 11 hours a night and I’m still so tired all day.

And not just tired I need to go to bed, tired as in I have no energy to do anything I feel really really drained.

It’s making work so much more harder.

I can’t have anymore caffeine then I’m already having a day

I just don’t know what to do

Is this normal ?

Why is it all of a sudden so tiring ?