But she couldn't get the thought out of her head.

I must have been out of my head a long time.

He tried to put the thought out of his head.

Might just have been something out of my own head.

I couldn't get the fact out of my head either.

Then why couldn't he get her out of his head?

How in the world did she get out of his head?

I haven't been able to get her out of my head for nearly two months.

But I didn't have enough energy to keep everyone out of my head.

The whole experience was difficult to get out of my head for several days.