Not sure. But first. Do are you taking any medication lately for an illness or sickness?
That could be a cause. The other one is maybe there is something that could be giving you an allergy in your bedroom or house that you could tie it too. Also what about the foods you are eating.
Did you just start a new diet? Of course the last thing is what are you filling your mind with? Have you been watching scary or haunting movies or reading those kinds of stories?
What about audio books? Just rationally go over changes in your mind first about this matter before you panic. There are other factors but they are spiritual.
As a Christian if that happened to me I would be praying. But that's just me as well as getting my prayer partners to pray about this. If this question was posted in the religion section where I usually am this is the answer I would give you.
Best of luck.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.