Hi Butterfly Rose,
My advice about using the Ouija board is a firm NO.
As Nakis said, it is a tool that can be good or bad, depending on one's knowledge on how to use it. But, the majority of us (including myself) are really no where near qualified to use one. They are dangerous, in that, if used by a novice, your chances of connecting to spirit is there, but you are more than likely going to get a lower level spirit - a nasty. And they WILL lie to you and tell you they are someone they are not. It can open a door to things you don't *even* want in your home. See, when you initiate the contact by using the Ouija, it's like an open invitation for them to come into your home. That's not a good thing. You don't want these lower level spirits hanging around - trust me!
I have used one before (I was much, much younger!) and did make contact; one was friendly one day, but the next day we got ahold of one that was not very personable. Did it unleash something in the house? I can't say for sure, but I'd be willing to bet the 'door' was left wide open...
Here's a quick story I'll relay to you - this happened to a very good friend of mine. I no longer have to wonder if those 'horror stories' about Ouija use by novices are true, because I know this person would not make this up.
J. and his brother C. used the Ouija when they were teens. I don't think he realized at the time that this may also have been part of what was causing all the fighting and strife in his family, but that's another story.... Somehow, his father found the board (he was lead to it in a most curious way - almost as if it drew him to it). His father hated the thing and wanted it out of the house pronto! He broke the board into quarters and threw it and it's box over the fence into the alley. J. actually saw it laying in the alley, so he's positive it was there.
A day or so later, in his brother's closet, where the board had been originally, was the board in it's box - in one piece! J. was shocked! He asked his brother if he'd gotten it out of the alley and put it back together somehow; his brother said absolutely not. There were no signs of it having been put back together with glue, tape or anything.... it was as if it had never been broken - or thrown out! Needless to say, this was just too much for them to comprehend. They finally took the board and it's box out to the desert and left it. It didn't return after that, thankfully.
So, again, I will say - please don't use the Ouija board, chances are you will regret it. When you use a tool like this, it's like calling a pay phone at Grand Central Station - any passer by can answer the phone - you don't know who (or in this case - what) you'll get. I'd recommend that you start by smudging/cleansing the house, because it does sound like you've got something going on.
Be safe!
Kell