::I stand up::
Hi.
My name is Judi and I am a diet coke addict.
{Hi Judi}
My addiction was the equivalent of more than 2 liters per day. I found that once I switched over to green tea (I make a pitcher of sun tea, and add mint and lo-cal sweetener), I abruptly dropped several pounds. So, now I drink about a gallon of the tea per day (it isn't very strong - almost like colored water), with only the occasional can of diet coke (once a week is about it).
The headache will pass - once your body detoxifies from all the caffeine. Good on ya, mate!
::sits back down::
Edited to add: I use the pink and or the blue sweetener, but am working towards using just stevia.