Does anybody else get headaches after riding? I have been getting full blown migraines about 2-3 hours after completing longer rides. The 3 that have happened this year were after the Iron Horse-50 mile hills, Durango 100-mostly flat, Susan Komen Century- hilly. These do not seem to be associated with hydration, voiding at every aid station, nor calorie intake of about 1200 or so. I normally do not get migraines and it is a bummer to be fatiqued but fine after a ride and then get home to relax and eat and end up flat on my back and vomiting. What is up? Does anybody else get these and if so, what do you do to avoid them? I have signed up for this years Fall Blaze another pretty flat century and am scared to death I am going to get another migraine. Yikes, please advise. Thank you, Lisa.