I have a bit of an issue with feeling sleepy and starting to drop off whenever I'm inactive for a while. I have a fairly busy lifestyle - teaching 3 days per week and tutoring 3 nights after school till 8pm. I also attend university one evening per week and have the associated reading and assignments to do. I'm pretty active and do lots of walking, home workouts several days per week and swimming twice per week. I don't get much spare time despite not working every day. My sleep patterns are less consistent than they should be - I usually don't get to bed till around 1am and only get 5.5 - 6 hours sleep on school nights, but make up for it on days off by lying in till 10:30 or 11. My diet isn't the best (Not enough fruit and veg, too much sweet stuff) and I probably drink too many energy drinks (mainly to help me get through days where I haven't slept enough). However. Most of the above has been my life for years, and I've managed. Being busy is part of teacher life as far as I'm concerned. But the sleeping problem has got worse recently. I'm now on anti anxiety medication (I'd got myself into a state of stress because of being so busy all the time) and its got worse since, but the doctor tells me that wouldn't cause drowsiness. I find that often when I sit down or when I'm bored, I find myself dropping off - even when I don't think I'm tired. It's usually when I sit down to study or attend university lectures, sonetimes when listening to children read in class, sometimes at tutoring too (usually at one particular client's house, weirdly). Today I almost fell asleep in my seminar and I have had a full night's sleep everyday since Saturday! I also find that I can sleep much more than before and will happily sleep till midday at the weekend (from a 2am bedtime). Getting up for work is also becoming more of a problem. Having done a little research, I don't think it's anything like narcolepsy, but am struggling to find potential causes. Any help or advice would be greatly appreciated. Sorry for the long post!