I empathize with you on the migraines. I have been having them ever since I was in 8th grade, the first of which was a classic - with visual disturbance, nausea/vomiting, and excrutiating pain.
Have never had one as bad since then, thank goodness. But the kind I get now are weird. They mostly involve my eyes. The only way I can desribe it is like losing complete peripheral vision. That ususally lasts for about 45 min. or so. As it starts to correct, there appears to be little squiggly lines everywhere. By this time, the headache starts, but it is never a severe headache. Sometimes, if I am really stressed, I can experience these episodes as frequently as several times a week, even several times a day, if it's really bad.
I don't worry about it anymore. A few years ago, when they became so frequent, I went to the doc, concerned I had a major problem, had a CT scan (which was normal) and followed up with a visit to an opthamologist, which turned out ok too. At the time, my home had been broken into, for the 3rd time in a year. I lived alone with my son, and had started sleeping with my gun by my side in bed. Made a decision to get the heck out of there.
So now, when they become more frequent, I stop to take a look at my life, to see what stressors there are that I can change. Positive change can certainly help alleviate them.