I'm not exactly spiritual or religious, but I've had my own fair share of experiences with things like Déjà Vu, seeing shadow people, seeing shadow people during sleep paralysis, hearing voices when waking up or in sleep paralysis, and probably more stuff I just don't recall.
Some of the more "frequent" and powerful experiences I've had occurred in my parents' home - I'm in college now in Florida, but the majority of my actual experiences occurred in my own house, and it's almost like the activity outside my own house is just almost nonexistent, besides the déjà vu and some occasional instances of seeing shadow people. I don't claim to be psychic but I know I may be clairvoyant to a degree; my family doesn't have a history of clairvoyance that I know of, but I cannot be certain due to there being a certain lack of information on my dad's end dealing with our family history tracing back to Japan. (I am half Japanese.)
Anyway, something I am slightly concerned about is due to my brother being a probable fool and messing with things he should not have been in our house. I know he has told me he did -something- to bring a lot of spirits into the house, which is also around the same time I began to experience sleep paralysis frequently and saw shadow people and began hearing things to a greater deal than before. He's fairly delusional half the time I do deal with him and I suspect he did something and that he hasn't rectified the situation he created yet. Every time I end up back home for breaks from school or something I get various experiences with seeing shadow people or otherwise. He claims he "closed the portal" he made, but he also has what I suspect to be a belief that he can force the things he brought in to do things via his own sheer force of will. He even told me he ran into a demon, which I think is highly unlikely since I doubt you could just "dominate" one like he thinks he can. To boot, his own behavior has become erratic following this supposed event, and I'm concerned myself he may have invited something in that has begun to affect him for the worse. Even my parents think his behavior was very different from how he used to act.
My bedroom there does have a mirror in it, which I think might exacerbate the issue, since it is a portal itself from what I've researched. However I have had the mirror there for a while before this incident he detailed to me and activity has picked up only after the fact it would seem. I can't exactly go around doing cleansing rituals on the house itself (My parents would not understand I think.) and I'm pretty certain that there's still activity there though I haven't been able to be around it for long enough to properly know for recent times. I've seen shadow people throughout the house, from the basement to my room in the upstairs area; my brother also claims to have seen weirder stuff like a reaper in the hallway once and some sort of general or something he saw. Most I suspect were him seeing spirits, though the reaper doesn't make a lot of sense to me since it didn't correlate to anything I know of with a death in the family or something like that. I've heard voices as well, but they were far too fast or sometimes just a strange ear-shattering whine type pitch. (I seriously mean ear shattering. It was basically ear-bleedingly bad sound.)
At any rate, I want to make sure my brother didn't do something really stupid, and if he did something really stupid, I need to figure out what will put a stop to it. If he brought something nasty in, specifically. My best guess is he made a portal somewhere and didn't close it; furthermore he probably tried an incorrect method and may have made the situation worse off.