Slight headache at night, wake up breaking fever?

Last night I had the slightest nagging headache that wouldnt go away. This morning I wake up EARLY, because my headache had gotten worse and I was either hot or cold, hot or cold and sweating and it felt like I was breaking a fever. I took some excedrin, went back to bed and woke up and the headache was pretty much gone. I feel a little dizzy right now still, and I feel like the headache could return. Any thoughts?