Depression & anxiety are unique to every individual as are the triggers. Are you in therapy for these issues? I ask because I had to learn that the triggers will always be there, somehow and someway, but it is up to me if and how I respond. My button cant get pushed if I have dealt with my button. So if you are prone to depression, anxiety and maybe issues of control and powerlessness, this cause very well trigger it. I assume you have talked to them. If there is a property manager- I guess you have already spoken to them. Have you considered calling law enforcement? Creepy neighbors are the worst and I am sorry you are going through this.