i have insomnia..i sometimes take Ambien..but it seems when i do fall asleep i cannot get enough of it and then i am sleeping too much, most of the time no matter how much i sleep i still do not wake feeling refreshed..i wake feeling like i need more sleep...and i can easily fall back to sleep for hours more, i can sleep off and on for the whole day into the evening, i dont understand why i am so tired and sleeping so many hours, i would like to get into some kind of a sleep pattern, i also have depression which i take Pristiq for