It will get better. It will, it will, it will.
Do something healthy and life-affirming with your baby bee and hornet this weekend. Something cheap or FREE, like a bike ride or a picnic with the girls. A trip to the park. Ice cream. So many hugs and cuddle time. This is a time when all that self-care business is so important -- early bed times, lots of rest, exercise, good food, cups of coffee on the front porch, gentle, safe things that make you smile.
I'm thinking of you. I don't have any practical suggestions about your job situation, other than that in my experience, platitudes about support aren't really support. F' em.
And F' your ex. He will get his.