I fully understand that people have to work and can't sit in the school parking lot all day waiting for their child to *maybe* get sick. A little communication goes an extremely long way, though. Parents know that it'll be a while before someone can get to the school. Just let the SN know. If I don't know what's going on, I'll give you an hour. After that, I'm calling you again and again and again until you arrive. Unfortunately, I do not have a resource officer
And, no, I will not send your feverish, vomiting, flu-like symptoms child back to class because you're out shopping!