Sounds like your 'reason to believe in [a very specific] God' is more like 'reason to believe something weird is happening in your house'.
Why is is that this house is so 'haunted'? And where are the visions of angels chasing the demons away etc.?
Why are some houses 'haunted' while most are peaceful? Seems like demons are trapped in some houses like birds in a cage, unable to escape the wooden walls.
But, by all means, I did the same thing you do once. I had a 'footsteps' experience when I was a kid, and growing up, for lack of evidence of angels or God, I took that experience at least as a sign that the spirit world existed, and therefore God had to exist as well. So I can relate, although it's really a non sequitur.
After I stopped believing in it, I've never had such an experience again. But - I guess Satan now already has me, so he doesn't need to play games with me anymore, while Christians are persecuted by demons and therefore see them... yes, I know the whole spiel.