Been in a similar situation and have a few friends have been though this so I can understand just how you feel.
I agree with the above Ro5ey and MartynS. Don’t be hurried.
I’d be staying in the house, very difficult to affect any changes from outside. Also better to find out what the hells going on. If everything was apparently OK a few days ago somethings going on. People just dont change their life plans in 2 days. You at least deserve an explanation (but a truthful one).
Get good legal advice.
Get her in to councilling if you can to open dialogue/resove.
Get your support network sorted, your gonna need family/friends.
Sound work out about any time off you may need to sort things/yourself.
And as said focus, you can panic later if you like 🙂
I feel for you dude.