The last 2 nights this has happened. Around 5-6 pm, after supper, I suddenly get very light headed. I feel stange all over, but mostly in my head. I can carry on a conversation, but I forget what I said immediatly after saying it and am often surprised to find myself talking. I try to go to bed and it lasts about an hour, maybe a bit more. I don't think it can be low blood sugar considering that we just ate and it does go away after I lie down for awhile....any ideas?