Yes, I did just drop caffeine. Actually, Pepsi in particular. I was in the mind frame of "well I won't ever be drinking this again, I better live it up!"
I feel like I'm drinking a lot of water but much of it is flavored (crystal light) so maybe that's adding to the headache. I was soooo miserable last night I ate (well, sucked on so they would last) a few semi-sweet choc chips and my headache went away enough for me to sleep. However, I felt very guilty!!!