Nobody prepares you for the grief.
Not grief like someone died -- though sometimes it feels that way. Grief for the life you thought you would have.
What you are feeling is normal. All of it -- the anger, the days where you are fine and then suddenly not, the weird guilt, the loneliness, the fear.
A few things that actually help:
Let yourself feel it. Fighting the grief makes it last longer.
Find your people. Not people who tell you you are right about everything -- people who show up. That is what this community is for.
Move your body. Thirty minutes of walking changes your brain chemistry.
Do not make major decisions right now. Stabilize first. Rebuild second.
Get professional support. Therapy during divorce is strategy, not weakness.
You are going to be okay. What is helping you emotionally right now?