My Baby Son Befriended By A Spirit?

hope this story isn't too long, I condensed it as much as I could:P

I have had a couple of supernatural experiences as a child (which I will post about maybe in future) but this one is more recent. My first story, so please be kind.

So, in April 2012 I gave birth to my son Leo. I was still living with my parents at the time and Leo slept in my room until about 2-3 months of age when we moved him into his own room. After he moved in there I started to notice a few things that seemed odd, like whenever I went in the room it would be freezing cold in certain spots, sometimes the whole room (even if it was warm in the rest of the house) but Leo himself was always warm.

I have a video baby monitor and I would often switch it on to see Leo laughing and his eyes following something around the room very closely. He would gurgle away happily, pause as though listening to a response, then gurgle back. I also heard footsteps in and around his room a lot. There was never anything visibly there. I decided that if it was a spirit, it probably wasn't dangerous because Leo seemed to like it.

In November 2012, Leo and I moved into a unit with my fiance. After a few months of living in the new place I noticed that whenever I was in the bathroom, I had a very bad feeling that would come over and I'd suddenly feel so sad and angry for no reason. Every time I had a shower I wondered if it was going to happen again, but I tried to forget about it.

Before we moved to this new place, Leo loved baths so much but ever since we moved here, he hates them and screams in terror the moment he sees the bath and the water. This was such a sudden change in behaviour and he's never had a bad experience or trauma involving water.

One night a few weeks ago, my fiance and I were out on the balcony just outside the living room having a cigarette when we heard a loud crash from inside. We went inside and a couple of Leo's toys were going off on their own, playing music and stuff. They were not near anything that could have bumped them, and we could find no source for the loud crash we heard.

We had a rather nervous laugh about it but carried on with our evening. Later when we were heading to bed, one of his toys started going off again, but this particular toy was broken and didn't play music or anything anymore. And all of a sudden, it was playing normally. The toy then stopped working again the next day.

I started wondering if it's a spirit of a child (hence the toys being played with) and maybe they died with something to do with water or drowned... It seems that Leo has taken on the negative vibe and fear of the water.

I also am not sure if it's even the same thing from Leo's first room because he didn't have the water fears back then, and I felt the bad vibes in the bathroom of this place too.

I work part-time and my fiance works full time so I'm home a lot more, and I hear unexplained noises during the day, whispering and the bad vibes are still there around the bathroom. I often have my belongings disappear only to find them right where I left them, or hidden in some odd place that I would not have put them myself. Also, things are always randomly falling down from where we put them with no apparent reason.

I think the spirit, especially if they're a child, enjoys playing tricks on me more than actually frightening me. But they also seem sad...?

What do you think?

Sorry if I used any incorrect terms, and I am happy to elaborate or answer questions if there's anything I didn't explain enough:)

Thank you!