Serious fatigue-PLEASE HELP!

Ok, so for about 4-5 days I have been so terribly exhausted I can barley think straight. It isn't a normal "get more sleep" problem, I get plenty of sleep. Go to bed at 9, wake up at 7-7:30. But for some reason I am extremely tired all day. My eyes can hardly stay open and I have no energy, I don't even want to eat on my lunch breaks, I'd rather nap. I am 24 weeks. Any one know any way to help? I started drinking Orange Juice to try and help, but it just wakes up my baby and not me lol. Am I anemic or could something else be wrong?