Suggest Treatment For Severe Headaches And Fever

Hi, My daughter is experiencing a pounding headache in the back of her head neck area. This started yesterday afternoon. Last night she took Aleve. This morning around 8 a.m. it was still pounding; I gave her two tylenol. She is 16 yrs. old weighs 123 pounds. As of 1:35 p.m. it is still pounding, she has a fever now of 101.2 and is extremely tired. Also has red circles around her eyes. I had here a few minutes ago put a flexible ice pack on the base of her neck and sit in the recliner slightly reclined. I also have her drinking Coke hoping the caffeine will help. She says when she stands she is dizzy and the pounding is bad. When she lays down she does not have the dizziness and the pounding lets up just a tiny bit. Is this a migraine or should I be worried about something else? She has never experienced this before.