Well...my 2 cents are probably too little, too late...
However... check your diet. I get awful headaches when I eat ONLY crappy foods and junk (and that is usually a reaction to stress, go figure!)
OR, in my case, optic neuritis for the first time. I just thought I had a rockin' 6 day headache. Turns out it's just my left eye screwing with me...
I dosed the whole thing with Mounds Bars (coconut's healthy, right?), peanut butter (sugar & protein balance each other) and motrin washed down w/lots of Dr. Pepper.
Oh, and it did freak me out enough to end my Rebif protest... so now I'm back on the interferon bandwagon again despite the side effects...
Bethany