It's never too late. Be extra, extra good to yourself right now. This isn't a relay, it's a marathon and you need to pace yourself. Believe that you and the kids will be ok and you will be. But make sure to put your needs first right now, not his. The kids have already lost one parent.
Ask for help, there's lots on this board. You are not alone.
Much Love,
Heather
"You know, it's times like these when I realize what a superhero I am." Tony Stark/Iron Man
“Focus on what you can do, then do it with all your heart.” Lois Wilson