I've had very little energy as well this time around, but I *think* eating extra protein is helping. I tend to crave carbs (chips, crackers, etc) but eating extra meat seems to help more.
I was the same way no energy at all...I am 12 wks preg and I have more energy I just woke up one morning feeling great outta nowhere!
your nearing the end of the first trimester and things will pick up energy wise soon, really all I can say is make sure your diet is good, getting enough fluids also a good prenatal can make the world of difference, rest when possible and make sure your getting enough sleep, let some things slide around the house until your energy levels get better as well