Security

Hi idk if I should get the police involved. Weird things have been happening over the years and I’ve never actually seen a person but it stopped for a while and then today I heard my sliding door open and close when no one was home. Before I’ve heard footsteps, tapping, and the animals would be let back in, and I hadn’t been the one to do it (again while home alone) maybe I’m going crazy and nothing seriously harmful has ever happened and again I’ve never seen anyone but I’m kinda scared and idk if the police will take me seriously or if it’s something to even bother calling them for. There’s never any evidence anyone was on the property much less in the house. I’m at a loss, if anyone is a police officer or know someone who is please tell me what to do