I Am Just So Very Tired

Must be the pregnancy hormones... I am feeling really lethargic, sleepy and moody these days. Just don't have the mood to do anything but sleep, though I've been getting 6-8 hours of sleep every night. The moment I am seated in front of my PC, my eyes tend to droop and my mind goes blank! I was reading a story book to Sherilyn a moment ago and less than 2 minutes into reading the book, I could not open my eyes again. I told Sher that mummy needs to nap but she wouldn't allow me and I was forced to finish reading the book to her, with my eyes half closed. My brain can only function after I have taken a 10-15 minute cat nap to have it recharged, once or twice a day.