Does this usually happen when you’re about to fall asleep?
If that’s the case, I think the most sensible explanation is Hypnagogia, a type of hallucination that is very common in healthy people when going from wakefulness to sleep.
The Wikipedia page on Hypnagogia includes examples of sights, sounds, and other sensations that are totally normal.
In this state, when you receive sensory information (vibrations, light, etc), your brain has to interpret that information. Usually it gets it right but sometimes it doesn’t, resulting in a hallucination.
I can’t know if what you experienced was a spiritual encounter or not but I do know that our brains play tricks on us especially when we are in this “threshold consciousness”, going into deep sleep.
If you are concerned it may have some deeper meaning, I recommend cleansing your room (and a house blessing if possible).
Don’t cast a circle if you don’t feel comfortable doing it, or simply wait and try again after some time! Use this guided circle casting video as practice (or this calling the quarters video).