Anti-depressants, mostly. Mood stabilizers. Which I'm not entirely sure you need so that we're going to play by ear.
But I think you'll most likely benefit from prolonged exposure therapy. These are things you haven't talked about and likely, you need to. We talk so much about getting rid of demons here, but you have your own to deal with before you can focus on saving the world from them.
At some point, I do think you need to try and talk this over with Marian. But it may be a long time before you're able to do so.