What about the company that built the nice new house? The house must have been unusually cheap from the start. And Jered must keep something in there from your time together too.

Why would they let the baby sleep alone in his room, after so many days of strange disturbances? That thing wants that child. Get someone who works as a medium to help figure things out.

Describe that thing to the users on Discord. Maybe somebody knows what kind of demon/monster it is, and what would usually help to get rid of it. Meanwhile try to protect your phone by drawing protective signs on the back (that might only work with a new and uninfected one though).