another visual migraine

Late this afternoon I had a visual migraine while driving. I was driving west and the glare from the sun was making it difficult to see so I didn't realise that I was having a migraine until I stopped. When I finished my journey and went inside a reasonably dark room I started seeing flashes of light (which weren't apparently bright enough to be noticed when outside). After about an hour the visual effects went away but I still felt weird for the rest of the day.