How do you maintain consistency when your schedule with work or family changes?

I still go to school, so maybe i can't give you an answer that fits perfectly into the situation you describe, but try to have some "me time" through out your day.
Give yourself 10 min, 15 min or more!
By doing this you also look after yourself, not just your family

You can spend your time trying to hold the consistency and taking care if yourself anyway you like it<3
Good luck!!