Regardless of what kind of divorce (religous or legal) it is a death. Allow yourself to grieve. There has been no legal steps taken in my case, yet I will tell you that my H could not be more divorced from me emotionally and that's where the hurt come from.
What is that you do that makes you feel good? I know the answer right now may be "nothing". Even so, get up and force yourself if you have to, to get out and minimally go for a walk. Do something that allows you to clear your head. I used to go on these long walks and I would run different scenarios in my head and even have convos outloud. May sound odd, but it got it out and expended the energy. There were times early on, I went for lots of these long walks. If that's not your thing, find something that is.
Do you meditate at all? I couldn't shut don't my mind from racing at first, but slowly, I was able to quiet my thoughts and get a benefit from this too.
I know all of this sounds like a crock right now. It feels like a black hole where your heart is. It truly does get better and the only thing that helps is time and taking care of yourself.
I know you have the stength to get through this. If I can do this, so can you.
