Hello, I've been having a lot of thoughts about death, not suicidal thoughts, but just death in general. example: I'd be walking home from school and a random person passes me, I think to myself "this guy is gonna take out a knife and stab me" I start to get really anxious after similar thoughts like those pass through my head. my grandmother passed late last year but those thoughts have been happening before her passing. I am 13 years old.