Do you...?

I spoke to my mother a couple hours ago. Or rather she called me here at work to ask about Little Man. "He's alright mom." "Is he still throwing up?" "Not as far as I know mother." "Well, haven't you called to check on him?"
Now, Im going to stop it there, because we get into me offering to give her the babysitter's number if SHE would like to call... it's not pretty. (I'm a little stressed...)
Anyway- this morning when I dropped my Little Man off I had told the babysitter that she could call me at work at any time, and I would leave if he got sick again. She told me not to worry, that she would call me if anything happened. No phone call from her=everything is fine. So I didn't want to bombard her with hourly phone calls while she was busy caring for my child. I convinced myself that I would call once during "lunch" just to check in. (Of course, my mother called before that.)
So my question is- do you call your child's caregiver to check on your child? Granted, you all would stay with your children if they were sick and I'm the world's worst mother for coming to work today...
Still, when he's not feeling well, I call. Any other day, i don't. I trust that she will call me if she needed to tell me something. And the kid's always in one piece with all his fingers and toes when I pick him up everyday. No bruises, no cuts... But the point is...that I'm probably not making much sense. I worry. I don't want to interrupt my babysitter's flow with my son...