This happens to me all the time. In the past I've had migraines that would go on for a month or more. I have all kinds of migraine medicine I can take, even a narcotic as a last resort. I've had catscans and everything and I don't have any neurological problems that they can see. All the doctors can do is keep prescribing medicine for me. My Dad is the one who figured out that MSG was the main cause of my migraines, but weather also plays a big part. I've had to eliminate caffeine and chocolate is starting to cause problems too.
The weather has been yucky and I've been eating chocolate chip cookies for the past few days. That's probably the reason for my migraines lately. 2372 days ago