Sleep problems

Over the last couple of years, my sleep patterns have become dreadful. I try to go to bed around 10.00pm during the week as my alarm goes off at 6.00am. I doubt if I get more than 6 hours sleep a night, even at weekends. I seem to wake up every two hours on the dot - 12.00am, 2.00am, 4.00am and then maybe 5.00ish. I do use the loo when I wake up, but only because, as I'm awake I may as well use it. What I mean is I don't think I waking up to use the loo because I need to! if I sleep longer, there's no problem. Clear as mud!!