Nannying advice

I’m a nanny for 2 kids. One kid got sick a couple days ago. And now the oldest one has a fever of 100.1. My throat does feel scratchy this morning but I went to work. I didn’t know other the girl had a fever until I left work today. I told the lady i don’t want to get sick and she laughed it off.. when I was leaving I told the girls bye and the mom told me “bye see you tomorrow” should I still go to work or should I text her I can’t go in Tomorrow?