Anytime I do any type of cardio exercise, walking, treadmill, rowing and long car rides, etc I feel a migraine starting in late evening and/or I will wake with one. Recently my doctor thinks it may be caused by by eye movements during motion. Causing a motion sickness type migraine. Recently I vomited 9 hours and finally had to get prescription for vomiting so I could keep my Imitrex down. Anyone else experience this or have any suggestions to offer?