A way to prevent migraines?!

I get horrible migraines (nausea, light, sound and scent sensitivities, the works) and I want to know if you guys know of any trigger foods that can either cause (so that I can avoid) or prevent (so that I can stock up) migraines. If you know of any vitamins or natural supplements that can help prevent them that would be helpful. I was previously prescribed a medicine to prevent migraines but I have stopped taking it because it was making me incredibly depressed and since then I have noticed that my migraines have been less frequent than they were before I was on the medicine. But I still get them a few times a month and when I do they are pretty much completely debilitating. I really don't want to go back on the medicine and would really like to find another way around them.

Additional Info:
-I'm a 21 year old female (I read somewhere that migraines are the worst between the ages of 18 and 25)
-I take the Yaz birth control pill to help with terrible mood swings around my periodHealth Question & Answer

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