This is how what I feel starts: I always know its going to happen and I have time to sit down because it feels like my heart rate slows and I'm lightheaded. Then I feel like all of my energy is suddenly drained. This only lasts for a few seconds to a minute. I am alert and responsive. I can move if I have to but for that minute I am extremely weak. After that I am fine though very tired, this lasts the rest of the day. Sometimes I am nauseous and have tingling in my fingers. Sometimes I will get a headache immediately or later that day. But I always end up with a headache. I do get migraines but I don't know if that is what this is. I recently had an EEG and it was abnormal. My doctor says this is a seizure but I don't think it is. Has anyone else experienced this?