Sorry didn't see your comment before posting mine. Get some iron supplements and things will change dramatically!
Is your iron low at all? I found taking iron supplements worked immediately, I was no longer fatigued, sleeping less and feeling more awake. :)
Same here i feel like I get so much sleep at night and im still tired!! But I also found out my iron was really low which they said can make u tired.
I worked 3rd shift also the grave yard shift blows but i set my alarm clock to wake me up so i wouldnt sleep my whole day away then i would make me some chamomile tea and get in the shower to wake me