I have had "hangover" type migraines for the past 15 years. They are triggered by hormonal changes and foods-including when I eat. For example, I can't eat after 6:30, no simple carbs after 4:00. No caffeine, alcohol, MSG, etc. 2 years ago, I had a complete hysterectomy to try to regulate hormones, but there was no change in the frequency. I have had great success with preventative meds, but they only work for 3 weeks, after which time my body adjusts and they never work again-even years later. I am SO frustrated! I can't go out to dinner, to parties, etc. unless I eat in advance. My neurologist, primary care doc and gyn are completely perplexed. Any suggestions would be greatly appreciated.