Start with one thing. Forget the list. You know what is the most important thing to do, because you already did it. Find a psychiatrist. Book the appointment. Make that your only “to-do” this week. Don’t worry about anything else until that is done. (And yes, I get it… easier said than done.) If you’re able to take a sick day, do so.
Stay off the articles of this site until you feel like things are a bit more in control. It is very easy to get lost in the rabbit hole of things you “could” do.
Oh, and hang in there. 🙂