Diva, I hope you've managed to give yourself some time off now !!! If you're not sleeping, you're probably not eating well either, its no wonder you're feeling tired and exhausted !! I know you feel like you're really behind, but would it be possible to actually give yourself some real time off ? An afternoon, or a day isn't going to help hugely, what about just saying to yourself, right on this date ( whatever that date could be ) I'm going to pick up my books, sit down and try to sort it out, but until then I'm going to have a small holiday, no work, some pampering time, lots of fresh air, away from home if possible, even a nice drive somewhere, and not even think about work until that date ? It seems to me that you're only giving yourself half hearted permission to take a break / day off, and thats bound to then be riddled with guilt !! You're not failing, or delaying, merely postponing for a short while. Even playing around with the words helps !! Make it sound not so negative, call it recuperation time, a few days sabbatical, anything so it doesn't seem so negative to you ! And try not to think of your work for that time, not easy I know, guilt is a terrible thing, but what use is it ?? So don't feel guilty, wrap up warm, get some fresh air, different environment if possible, and enjoy !! You'll get back to it, hopefully feeling just a little bit more refreshed, I'm sure of it, you've already achieved a lot in this last year, now its time for you to practise what you tell others to do, and be kind to yourself !!