14yr old-- fever of 100.7, stiff neck, cough, sore throat, and headache?

Go to doctor ASAP. One year olds can become severely ill very quickly. Stiff neck, although usually benign, can be a symptom of meningitis, along with headache. Please have them seen now.
See the doctor. This is a problem that necessitates a face-to-face meeting with your doctor. This will allow him/her to examine you, ask specific questions. And possibly order tests to find out what's wrong and what to do to help you.