Sleep problem, need help!

I am a person who goes to bed by 10 pm because I am too sleepy by that time. The problem is, when I wake up to use the loo, I cannot go back to sleep that easy. Sometimes, it would take two hours before I can sleep again. What I did lately is to get up from bed and do some paper work to pass the time. I get sleepy at 9am so I go back to bed to sleep for an hour. This has been going on for a month now. I got headaches and my eyes hurt. I know this is unhealthy but I don't know what to do? an you give advice please!