This happened us this week, DD is 8. She has had a weak stomach in the past, but when sick, DH and I have always covered it and juggled work etc.
This week though, she is stressed to the gills, is doing too many activities ( we know and are trying to limit), is doing an emotional literacy course for her ASD, has her 1st communion in 8 days and DH and I are also stressed out work wise and with her so a lot more shorty than normal ( which we know doesn't help, but sometimes knowing is not the same as doing).
We'd, she got a taxi to her course with the Au pair. Wednesday. She felt sick en route and got slightly sick on way home. She is prone to carsickness, and on top of all the other stresses, that seemed to be it. She was quiet for the evening, but really really wanted to go to school yest. She'd eaten ok, slept well, and bounced around yest morn. So we agreed she'd go to school, come home instead of athletics afterschool, and it was up to AP and herself to decide on swimming class but definitely taxi not cycling ther if they went.
Had a good day at school (just as well she went as the first practise in church happened and she's been given a job), not happy skipping athletics but did relax at home, went to swimming and was out with a friend climbing trees when I got home.
If I thought it was a bug, I would have kept her home as usual in such cases. But having been reasonably confident what it was, I stayed at home until she got up yesterday (me deciding, not AP) to see if she should go to school or not - she'd have been bored silly at home and caused chaos, missed important stuff at school and emotions would have spilled over yet again.
And I have got calls from school, as she can germinate things fast, but we always bring her home ASAP and keep her home until she's better when it is a virus or infection of some sort. We don't want her to suffer, or anyone else unnecessarily.