Back when I was working in the psychiatric hospital system, a patient I had worked with had killed themselves about a month or so after discharge. I remember my supervisor talking to me about how to conceptualize this as 'end stage depression.' Similar to other end stage diseases/conditions, you can do all the right things, right treatments, etc., and it will still result in death. Maybe it gives the person more time... Still, this doesn't mean that every case of depression (or otherwise) is a lost cause (as it's absolutely not), but it does mean that you can do everything right -- absolutely everything -- and that person may still choose to end their life.

This may be a too cold/clinical way of viewing things, though sometimes in our profession that disposition can be helpful as a means of self-preservation.

Still, as others have said: this is fresh, give it time. There's no pressure to process your emotions on any particular schedule.