I live in an apartment by myself. The first thing I do when I get home is locking the door. But for some reason sometimes I be sitting on the couch or preparing a meal and the thought of me possibly forgetting to lock the door gives me a bad stomach feeling. I’m always glaring at the door making sure it’s locked. I never forgot to do it but for some reason the thought of it is always returning to my mind. I even remember being dead asleep in the middle of the night and suddenly waking up thinking about it. I live in a nice and relatively safe neighbourhood but the first night I spent here by myself some crazy front door neighbour’s ex boyfriend who knew the apartment code tried to break into her house at 5am punching and kicking the door to the point my apartment was shaking. Other neighbours called the police and they arrested him but I think that’s the reason why I’m always so anxious and worried about the door being locked… any suggestions on how to deal with it?