I'd say either the gumball one or squidwards suicide. Both gave me nightmares for a while.

I not heard of the Gumball one , but I seen the Squidward's suicide on you tube and when my daughter 1st seen it it creep her out.

one called "an Egg". it still trips me up and really makes me think about life, i read it a while ago

I know I could be having sex with myself, and gave birth to myself cause I am god in my own universe.

Right? X3 but seriously, it's the only story that filled me with intense loneliness when I read it, super disturbing

I agree.

I dunno what it was called, but in the middle of the night, a little girl asks if she can sleep in her dad's bed and he agrees, but in the morning he remembers that she was at her mom's house that weekend.
I never really kept up with creepypasta stuff too much, so there's very few things other than Slendermand and the Russian Sleep Experiment that I can recall.

I kinda remember that story too. I just don't remember how it ends.