House at it again!!!

We just got home from bringing our son home from the hospital and I went up to use the bathroom. While I was up there I heard a door opening and I yelled, "who's there?" I got no reply and the next thing  Iknow the bathtub water turns itself on and I physically had to turn the knob to turn it back off. I came out to the hallway to see what door got opened and none of them were open.