Occasionally I get migraines and/or visual disturbances (flashing lights), last night I had a head ache so went to bed, I can't really remember being in bed, I must aphave passed out straight away which isn't like me, a hour later I woke up and felt wide awake then eventually fell back to sleep. Today I feel really spaced out and the room is spinning a little, I feel really tired despite getting plenty of sleep. I feel like I could fall asleep ( struggled at work this morning ). Does anyone else get this after a head ache/migraine?