Sleep Deprivation

All I wish is a sound and uninterrupted sleep at night.  For as long as I can remember, no matter how tired I am, my eyes automatically open at 3 am.  It's always something else.  I've tried many things to help with my sleep deprivation....from drinking milk at night, warm bath, using whole body pillows, complete darkness...yet nothing seems to work.  My family suggested going to a sleep doctor but I don't have the time to spare in addressing this issue.  I plan on taking a 2 week leave of absence from work so I can focus on what's important to me.  I believe that a sound mind and body is a big contributing factor in one's productivity.