Is something being projected from the head?
Is someone speaking to you?
Odd ideas?
Someone after your private login?
Prompted to respond?
Some temple pressure?

Someone may have done a Fantastic Voyage style leap into your head.
May not, but worth asking yourself.
Some times people, in it. Sometimes, like a Tale of Interest. Sometimes it may all robotic and frightening like a bug in design.
Ask yourself, what’s in my head, who put it there?
Insane is assuming nothing, or assuming what it is….repressing a thought can drive you there.