Sleepless again...

Been having problem sleeping the last few nights... No idea why, but just couldn't fall asleep.. Tossed and turned the whole night... from 12mn til almost 2.30am... then I sort of drifted into slumber and I will wake up at 6.45am to go to work (almost) every morning .. I don't feel sleepy the whole day except during my bus trip home from office and around 9-10pm. However, I do feel my head getting kinda heavier and heavier...

Think I need to find a way to get proper sleep..