Boys Room And Diningroom

I was sitting downstairs watching tv and kept hearing something banging around upstairs in the boys room. I know neither one of them are home so it wasn't them. I tried ignoring it, but it kept doing it. I went upstairs to check it out and when I got to the door I heard voices, but I could not make out what was being said. I stepped away and went to the bathroom and came back and still heard the voices and I stood at the door a little longer then before and I felt a cold breeze come from the room so I moved away from the door and went down the hall, the cold breeze followed. I went downstairs and out to the kitchen to get a drink and have a smoke and as I usually do, I walk back and forth from kitchen to diningroom. When I entered the diningroom I heard one of the chairs move and I thought, maybe it was from me walking on the diningroom floor so Iwent back out and walked back in and nothing, so something was also in the diningroom moving chairs or whatever was upstairs followed me downstairs. Both of these happenings happened within a matter of minutes in different rooms and as of late, this is a little out of the ordinary of things just happening in one specific room at a time.