Well the funny/weird part is, I didn't actually have headaches after I cut down on the caffeine and aspartame intake. I had gotten headaches MANY times while drinking and consuming tons of caffeine/aspartame.
I actually had an MRI done, per my mom's instructions, when I was 20 I believe, but they never found anything.... which is good though!
But yeah, I'm happy that I don't have to pop a bunch of pain pills 4, 5 or 6 times a week because of the amount of aspartame in my body.
I actually just read somewhere that 80% of headaches are caused by a food allergen (which both aspartame and caffeine can be) reaction, and most people never know.