Can't Sleep. Any Ideas?.

Rayna • TTC #1 for a 2015 baby. Miscarriage in May 2013.
For the past few weeks I guess I've got my days and nights mixed up because either I can't sleep at all or don't go to sleep until like 4 or 5 in the morning and when I do sleep I don't sleep but for like two or three hours. I really don't want to have to take medication that isn't needed. So does anybody have any ideas how to fix this and make me sleep longer?..