Did the school at least leave a legit voicemail? (Curious)
Yeah, I may miss these occasionally, but I see them almost immediately if they leave a voicemail — and they should, if it’s important — and then call them back, and apologize for the missed call, which they always empathize with.
I lose at most a minute or two, which is totally acceptable.
If you want me to pick up, send an sms explaining what it's about.
I rarely leave voicemails, but I will when it's urgent.
tl;dr: leave message+number, how you do so is up to you
The proper procedure is for the nurse to leave a voicemail with their school-provided contact number (either the school office or a way to dial them directly that isn't their personal number).