Casensmom, I get those feelings of lighting bolt and then blackness in my head. They generally happen when I am under a lot of stress. I don't think they are related to my meds, although I am not sure. It sounds like you are under an intense amount of stress. Could they be stress related? When they start happening to me, I immediately close my eyes and take in a few long breaths and try to relax. I focus on breathing in deep and then exhaling the anxiety. I hope you don't think it is corny, but it helps me. Maybe somebody else will have some ideas....hang in there.