Where's my energy?

Tiffany
I am 22 weeks and 1 day today and I literally have no energy...this week especially! I went to bed last night at around 8 something, slept until 6 this morning to take my daughter to school, got back and went back to sleep for 2 hrs! I have a flexible job schedule (thank God) but dang! Anyone else feeling this way? And suggestions to gain more energy?