I'm not sleepy yet.

I hardly got any sleep.

I'm going to bed.

I've only slept for an hour.

You're up.

It's way past time for bed.

Why are you up?

Why are you not sleeping?

I'm gonna go to bed.

Get to sleep.

я засыпаю перевод на английский

I'm falling asleep.

I'm just about to fall asleep.