P.S. the one migraine I did have caused a temporary blindness in one eye. I could only see half of things because there was a large blind spot that formed in my left eye. The headache began a couple of hours after this vision problem materialized. It was misdiagnosed as a small stroke and I operated on that misassumption for years. Then on the Diane Rehm morning talk show a couple of years ago an expert in the field of headaches was discussing this and described exactly my symptom. What an eye opener, so to speak!