Welcome to school nursing and allnurses
It can't be easy starting from scratch. Here are some ideas that may help.
1. You should have a health record for each student, check them against your class lists to verify compliance with immunizations and ppd. List any recorded health problems for follow up.
2.Don't feel bad about having to send kids home, some parents are not sure the child is really ill so they send them to school knowing they may get a call from the nurse.
3. Keep a log of visitors to your office.
4.Policy here is to follow up on injuries only if the child was sent home.
5.Speak to the principal about addressing a faculty meeting to speak about universal precautions etc.
Good luck, Mrs. B. Come back & let us know how it's going.