Sending you so much love @Soconfusedandsadx.
You have the strength to cope with this, you already have three beautiful children and have overcome so much to get through the marriage breakup.
While things are incredibly overwhelming right now, gradually they will get better and at some point you are going to be looking back on this in a better and happier position.
Have faith in yourself and take all the comfort and support that you can get from others. Stay strong and one day at a time.
As others have said, the housework can wait, if you feel it would help (and can afford it) get a cleaner in so you’ve less to do. Most of all concentrate on feeding yourself and the kids and getting through.
You are an amazing woman, this reptile putting you through this is a reflection of himself and not you, the positive is you will have your beautiful new daughter and a fresh start without anyone destructive and deceitful in it.
Huge hugs, be kind to yourself all you can. 💐