I remind myself of this: this is school. These students don't have a school nurse at home. School isn't meant to be an urgent care center. Yes, I can catch things because I have more training than most patients medically, but I can only do what I can with the tools I have.
Do parents sometimes expect more? Yep, they do. But it isn't more. Daycare centers, afterschool care, they don't have urgent care access either. And kids are interesting creatures that compensate well and change quickly later; you can only assess and report what you see at that snapshot in time.
As for the person upthread that said they wish they had access to more resources with Title I schools. Heck, yeah! I wish I did. But at the end of the day, I can't refer a kid anywhere without parent permission and I also can't usually go with the kid while they get checked out and really need that adult support. Sure, one can argue a teen can do it on their own, but I'd recommend every person, even adults, not have to go to ED by themselves if they have access to a person who can go with them.
At my school, we have a great staff member that will take students to appointments with parent permission. That person isn't medical, but I love that person and their work is very supportive to me and mostly to the student who needs it, but for some reason, can't have a parent do it.
Okay, I'm off my soapbox now. SaltineQueen, you are doing the best you can. And most parents know and appreciate that.