I Am Terrified

About 10 years ago when I was in my late fifties I experienced for the first time what I now assume is an aura (with swirling vision and flashes). Over the past several years I have had two MRIs, and each time my doctor diagnosed migraine. The "attacks" have been infrequent, but they are getting worse. When they come I can't read anything. Even if I manage to make out a written word through my impaired vision, I can't make sense of it. I can't remember words and I talk nonsense. Yesterday was the worst yet. I had to lie down in a darkened room and I had trouble remembering the names of my children and grandchildren. I knew it was my daughter's birthday, but I didn't know what day or month it was and I couldn't remember any other birthdays, even my own. It was the most frightening experience I have ever had and the terror I felt caused me to search for a forum where I can get encouragement from other sufferers. I only feel a slight pressure in my head and no pain when I have an attack, but I would much rather have severe pain and nausea than the extreme mental impairment. I am so frightened.