a little bit very bloody knackered

We slept for hours on holiday. The shutters on the windows made it so dark that we didn't wake up. We just stayed asleep. We had like ten or eleven hours a night. The other half also managed to fit in a siesta every day. It was awesome.
The seven hours I'm getting now is simply not sufficient.
I need a nana nap already. And it's only 9.30am.