Hi
@etezete.
I know there are "psychic dreams" where you have a dream of something that actually will happen. People had 9/11 dreams of the Twin Towers being attacked beforehand. Perhaps you had something of a psychic vision. It certainly seems premonitory.
What seems to be the important thing is that
you do not know where a thought or an image came from; in that, it is something foreign to you. Maybe sometimes this is a very subtle thing. So, it's important to really check in with your own customary inner dialogue... if something seems strange or foreign, it could be because it is. It's from elsewhere. And especially if it's enticing you to do something you otherwise know to be unlike you.
Interesting you say you did ask a question in your meditation before you had this nightmarish vision.
Do you remember what you had asked?
I'm remembering Laura's account of the person who had joined a Wicca group, and that person was doing a prescribed ritual of sitting in a hot bath with a lot of steam, and with a mirror to peer into -- I don't recall exactly what the ritual was, but it was to beckon some manner of spirit. This resulted in the person having a really nasty spirit attachment, and luckily Laura was able to vanquish the thing. But, yeah, sometimes you get far more than you bargain for (!)