Serious paranormal question.?

Well at first i was a skeptic on this whole "ghost" thing. But recently me and my girl friend bought this new house outside of town. Im not going to lie it has scared me to the point i don't know what to do. There are objects that smash to the ground in the middle of the night, and i keep having the reoccurring nightmares on the devil. From what i herd paranormal stuff just escalates from this so what can i do to prevent it? I was thinking maybe making fun of the spirit/demon/ghost as well as mock it for being dead. Like make it feel like it doesn't belong. I was also thinking about buying a dozen crucifix's for the house to push it out of the house. Also i was thinking about purchasing a book on demonology to see what a couple of the names of demons would be so i could try banishing them by saying "God hates ________" . What do you guys think? Also if this doesn't work do you know any paranormal investigators/priests in St. Louis, Missouri who can help me out?