Don't believe anything you read on Reddit, period. Not to mention the story was written on a throwaway account. Why?
I've seen that story all over the place as well, I know i've seen it on 4chan and here's a creepypasta page referencing it as well.
The story and it's background are so mucked up now that it may be impossible to backtrace to a real thing. It also reminds me a lot of Junji Ito's "Long Dream". A good 1 chapter read, too bad Halloween just passed!