Two thoughts: consider the direction your head is pointing (“Sleeping in the wrong direction can also cause health problems. Vasthu Sastra recommends that the head must be placed towards the east for undisturbed sleep. The second best sleeping direction is with the head towards the west, the third choice is south.” http://www.vasthusastra.com/sleeping_position.asp). and look into the two-sleeps theory (“We often worry about lying awake in the middle of the night – but it could be good for you. A growing body of evidence from both science and history suggests that the eight-hour sleep may be unnatural.” http://www.bbc.co.uk/news/magazine-16964783).
I found that when I sleep with my head at the foot of my bed which faces west (my place is so small the bed only fits one way so I have to sleep with my head at the foot), I sleep much better – never for 8 uninterrupted hours but sometimes a solid 5. I also get up if I wake up after 4+ hours (I go to bed early) and go back to bed when I get sleepy again. Of course, I’m retired so I can do that. I’ve discovered I sleep much more deeply at daughter’s house since I’ve spent the day in vigorous physical activity. Maybe you should get a one year old in the house and see how that works 