A previous poster mentioned Nutrasweet as a trigger. There are many others red wine, processed meats (hot dogs, lunch meat, etc) can also be triggers because of the nitrates & nitrites. Other triggers can be MSG (Chinese food) aged cheeses (cheddar), diet pop (Nutrasweet). I also knew someone for whom tomato sauce was a trigger. She could eat a serving or two but more than that was pushing it for her.

Personally, I grind my teeth in my sleep and a visit to an orthodontist where I had a special night guard made to sleep in helped me a lot. My best friend and I are also affected by the weather patterns. When the seasonal patterns start to change and big fronts come through we feel it. I'm in Central Ohio and some years are worse than others.

Also, don't limit yourself to Imitrex. There are other drugs available now that do the same thing, Maxalt & Zomig are a couple. And one of the newer ones may work better for you. I had good luck with the injectable Imitrex but, never with the oral form. I get good results with Maxalt & Zomig both. But, my insurance only covers the Maxalt so that's the one I use now.

Good Luck
Robin

*Soapbox* - you don't say much about your doctor. But, if he/she hasn't mentioned any of the food triggers and other things then find a doctor who is more up-to-date with the research. And Kaiti's suggestion to visit a good neurologist is a good place to start. And check him/her out too. Some are very up on the recent migraine studies. Sorry, I was told too many times in my teens & 20's that it was all in my head (so to speak).