Did you hire a lawyer? Don't try to think what she might do. You control yourself. You need a plan to stay busy and productive. This is real and it is manageable if you are prepared. What happens if you don't sign or go to mediation?
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.