Did you go to the doctor? It sounds like you need antibiotics for a bacterial infection, yikes! Take care of yourself. I wrote 3 paid personal days into my contract a few years ago and I've only used one sick day in over 4 years. Believe me, parents will leave their children with you if you look and sound like death unless you take care of yourself. But out of respect and consideration to your clients if you do take a day off give them lots of notice to make other arrangements.