I'm
i'm on my bed right now
So
MY encounters have been minor
Just some small shadows appearing out of thin air and dashing across my room
BUT
My brother claims to have seen a tall, pale figure with a white dress on, at 4 A.M.
Okay
Generally spirits take about a month to investigate their new guests and determine if they are a threat. It is different for all spirits, though. Once that time is done, they either leave you alone, or start getting aggressive.