I'd say tired is normal. I slept a good 14+ hours per day while pregnant with twins, and probably could have slept more, but I did have to go to work for about 6 hours per day 4 days a week. (Where all I did was sit at my desk anyway.) :P I'd only get up to eat, go to the bathroom, and head back to bed. IIRC, I'd get up about 9am, get home from work about 4, nap till 7, eat, back to bed at 8 or 9pm, sleep till 9am again. On days I didn't work I'd sleep even more than that, or just lie on the couch watching TV. Eating and sleeping are the best things you can do for your babies. Best of luck!
Mama to twin boys born at 30 weeks. 5/21/10.