Hi Erin,
From the time I was first pregnant (25 years ago) to maybe a year ago, I got incredible migraines and have always been told that the headaches and Adies have absolutely nothing in common. I haven't had a bad migraine in approximately 6-8 months, but I still have the Adies. My own personal feeling, no matter what anyone says, is that there is a relation. I don't know when I got the Adies pupil, but the doctor's feel it was sometime in my 20's and that's when I first started getting migraines. Good luck with your research!
Stephanie