Moving Objects, Touching And Voices

I have to tell somebody about these things so I decided to go ahead and put it on this site. I don’t tell my wife about them because I don’t want her to get scared, and I don’t tell my co-workers or friends about them because I don’t want them to think I’m crazy.
Just a little background: I’m twenty-six, have a wife and a two and a half year old boy.
We moved into a trailer over a year ago. Things were fine for about four months. Then things started happening. Not crazy or even really scary things, just things like I would hear footsteps pounding down the hall like when my son runs. When I go to yell at him to get in bed, he is fast asleep with my wife. A lot of times I will hear bits and pieces of male and females having conversations, sometimes even inches from my head. I hear children laughing through my son’s monitor and when I go into his room, I can still hear it on monitor even though nobody is there. When I say something, they stop.
I stay up later then my wife and child because I don’t have to be at work until later, so I’m usually awake when these things happen. I get tugs on my shirt when sitting on the ground and have even been what felt like pinched before. Things go missing and turn up later in odd places, which a lot of times I can write off as my two year old. Once, three weeks ago, I woke up to all the chairs stacked on the table in the kitchen.