It depends on the event I guess. Just something weird or a bump in the night, I get over it pretty quickly. When I lived alone in a ground floor apartment once, i was burglarized during the daytime so I felt very unsafe and that someone had to have been watching me to know my routine. In that case I just moved to a different apartment in a safer neighborhood (I’d apartment-hunter from states away!) and made sure it was second floor or higher. You can take security measures like that (no one will be coming in the window from a higher up floor). Now that I’m a homeowner I have dogs and a firearm to protect myself if need be (I did take a safety course to get comfortable handling it. The gun. Not the dog).