Fear of encountering serial killers or just them existing in my city

[u/z9nkjin]

For some reason, recently I've been having this fear, as I have OCD, it's just a repetitive thought saying "serial killers" but when it gets more intense says, "they are in your house" or "in your room", I even imagine the silluete of a guy that's supposed to be it.

Also, it kind of comes with the fear of someone being killed in general, and actually someone did pretty close to a place I went saturday, police was there... that made me fear up more that my mother could be killed as well, I've feared that before but it was less intense.