Debilitating migraines began about 25 years ago for me. They were usually 8 hours in length, and I could experience them for 80 or 90 days in a row. In a dark room, head throbbing, often vomiting which made things worse. All I could do was ride it out.
This went on for 20 years. I even experienced double vision on two occasions. Then the silent migraines began. I would have all the symptoms but without a headache, and suffered with confusion, depression, and even amnesia. That's when I was assessed for stroke and seizure disorder.
I tried some of the medications that are used for seizure and migraine prevention but they made me so depressed that I became suicidal. Then I tried 500 mg of riboflavin daily, along with chiropractic and acupuncture treatments. These together saved me.
I still have the silent migraines though, on occasion. I find them tough to recognize because I just see sparkly lights similar to tinsel, and nothing else. But that's when the cognitive issues get so awful that I can't function. I almost miss the headaches. Almost! At least then I knew I had to take measures to make things better.