Thanks for the comments guys. I don't have kids as most of you have guessed, I do however have a stressful job which pretty much requires me to be awake at all sorts of hours for long periods of time. Recently I've been getting about 2 or 3 hours sleep in the morning before going back to work again, so far I just feel dizzy and find myself believing it's evening when it's morning etc.. I guess if all you parents can go so long without sleep and make it through without v, there's no reason why I can't too.