Hedley Lamarr said:
Just in case anyone thinks about playing with those, don't. They are real and they don't call up very nice spirits.
i don't know your entire story but it seems pretty similar to a friend of mine from highschool. you didn't grow up in rock island, IL did you by chance?
his family was big into ceremonies and ouijii boards. their house ended up becoming possesed. here's a couple accounts of what happened according to him:
one time he was sitting on the toilet directly above the table they gathered around in the basement (it was a creepy set up in the basement imho). a "spirit" or maybe he referred to it as a "vapor" i can't remember, came up through the floor in front of him and consumed him somehow. he said he felt paralized for some time, i can't remember how long. maybe a minute or so. then it left and continued straght up through the ceiling.
another time they were gone from the house and it caught fire. how it caught fire: a mirror in the upstairs hallway somehow became convexed to focus the sunlight from a window on the family picture across the hall from the mirror. no sh!t.
any of that sound like what you've come to know?