Sleeping time

The past one week, my sleeping time has changed dramatically. Try as I might, I just couldn't sleep come night time, the usual sleeping time. Twelve midnight, one, two, three in the morning and so on, my eyes still refused to shut or my brain refused to stop functioning. I cannot sleep, to put it simply. At four thirty, my alarm will ring for 'sahur'. That's it for the night. No more trying to sleep. I will have my food, then go to the surau for the morning prayer. When I get back home, its about half past six in the morning already. That's when I will feel sleepy. Usually by nine, I will be sleeping soundly i.e. if the children don't disturb me. Otherwise, it will drag on .....  Sigh.....