School making my vomiting child go in

My LO's school is great, only problem is the office workers and parent support worker. They are super rude and forceful. This morning I called saying my little one was sick and couldn't come in, the office worker barraged me with questions then said as the mother I should be able to know exactly why she vomited and decide whether to bring her in. I said I called because I wont be bringing her in and Idk what set of the vomiting.

A little while later the parent support worker calls gently saying that if my LO didn't vomit again in the morning she's fine to attend in the afternoon, and said I should bring her in.

Well I did and she was fine, but she's vomited again at home at 5ish and now I'm gonna have to repeat this again tomorrow 😭