Scary things happening in the night?

I feel like I need to post what has happened to me and my girlfriend a few months ago during a few nights before I ask my question about what is happening now. A quick cap is maybe 6 months ago me and my girlfriend were in my apartment and fell asleep on the couch, we woke up a few hours later at around 3:00am and went to the bedroom to go to sleep. Well I turned on my fan for noise and conked out. About an hour later we both got woken up to a loud bang (heard it over the loud fan), we both just laid there and I started to drift back to sleep, then, BANG again but this time louder. I was like what the heck and my girlfriend asked what was that, I just told her it was probably the fan or something stupid like that when once again I heard a sound but this time scratching down a wall. I immediately sat up and looked around the room (my eyes could see outlines of things in the room pretty well) I remember seeing my fan located on the dresser and I looked to her and said it was the neighbors and fell asleep.

The next day we awoke and both sorta forgot about it all, that is until we got out of bed and looked at the room. my dresser that once had my charging phone, 2 bottles of clogne, a snowboarding handkerchief and a fan on top of it, now only had a fan barely sitting on top of it. Everything else was thrown around my room. I look down about 6 feet from the dresser and find my phone unhooked from the charger and the back of it has a scrape on it, I look up to the wall and see a scrape along the wall as well (I also see scratches on the metal clogne bottles). This all freaks us out but I have to move on. The next night I end up going to bed (again with my girlfriend) at around 11:00pm, I am awoken again at 3:00am by a low monotone sound in my ear that sounded exactly like on the movie "The Grudge". I immediately yell at my girlfriend to stop doing that which awakens her immediately, saying "what the heck!?" I start to explain what happened when there is a huge bang. This time the sound was extremely loud and I immediately jumped out of bed and ran across the room to turn the light on, thats when I trip on something and hurt my toe. I turn the light on and there is a "Dolly" (like a metal cart for furniture) right in the middle of my room. before I went to sleep it was sitting by my wall near the baseboard. So to make this shorter we stayed up most of the night and had the light on.

Moving on to what has been happening for over a week straight now. We haven't had anything happen physically like that since then, now I have been having nightmares (strong enough ones to wake me up) in the middle of the night. That isn't what scares me, what scares me is for the last four of them I have been looking at the time when I wake up and it is exactly 3:00am every time. that has been scaring me, almost as much as the nightmares do.

Why is this happening to me? How can I make it stop!? My girlfriend is scared too. :/