It is very important that you are a born-again Christian. Why? Because then you have authority over those suckers. God gave us the means through Jesus to cast them out, and shew them away.
If you aren't a born again Christian, this won't help you at all:
God told us to speak to the mountain (Matthew 21:21). He also told us to resist the devil, and if we do so, he WILL flee (James 4:7). Also, the devil and his lackeys only have as much power as you give him. As soon as Jesus died and then became resurrected, death lost its power. How does one give him power? By empowering him with words and actions. Be mindful of what you do. Bu more importantly, if you need something to say, say this: "In Jesus' name, Satan, get behind me!" or "In the name of Jesus, Satan, get away from me!" Something along the lines of that. And to resist means to actively fight against. If Satan resists one dose of the Holy Ghost, he won't be able to withstand two!
Like I said, if you aren't a born again Christian, this won't help. God bless you, Karen, and remember: God is bigger than anything out there, and He loves you.