Work problems... Help!

Kathryn
I'm 6w3d today. I'm barely able to keep my eyes open throughout the day. I sleep through all my alarms even though I go to bed at a decent hour. Is this normal? 
How do you ladies manage to stay awake with no coffee!?
Growing a baby is tiring, and in my line of work I use power tools so it's not ok to not be fully alert. I used to drink loads of caffeine and now that I have none my body has zero motivation to stay awake.