Yes. And I only took the extra client so that I could save up for my baby
Do you work for an agency?
Get a new client. No one outside of your family is gonna care for you like you/family will. If you've told your client your situation and they still don't show empathy then why work for them. No job is worth losing your child for over working, stress, or even because you don't eat.
Do you work for an agency?