Feeling Really Tired

I have been feeling really really tired, lethargic and moody these days. Though I get 6-7 hours of sleep every night, I still find it difficult to pull myself out of bed in the morning these days. During the initial stages of my pregnancy, I still have the stamina and enthusiasm to wake up at crazy hours to check for offers. Now, sleep is really important to me. If I don't get enough sleep, I feel as if there is no energy in every part of my body and I feel terribly moody too. I wonder if it's caused by the wacky pregnancy hormones. I just can't wait to pop my baby out and have a look at her.