That's the situation I'm in now...I'm in nursing school, and you don't get days off for clinicals. At all. Miss some time and you are done, sorry about your luck. I've been fortunate that my DH and family hs been picking up some of the slack with the kiddos, and that they are normally very healthy kids.
As for DH, he does not have paid time off - vacation or sick time. He was laid off for about 8 months and couldn't find another job (we live near Detroit), and then he was called back to his job. The only stipulation? That there is no promise of full time hours, no paid time off, and a very, very stripped down bennies package. Our insurance allows 2 dr. visits per person, per year and everything else is OOP. No dental coverage. He goes to work when he's sick.
I'm happy we've got something coming in, but it's going to be a long year until I can take the boards.