Sleeping habits?

Rebecca
So some nights ill be so tired I'll pass out as early as 9 or 10 and then sleep until late morning the next morning getting 12+ hours of sleep. Then nights like last night I can't sleep until 1:30 and then wake up at 6:30 wide awake and unable to get back to sleep. Anyone else deal with this? 
P.S. 7 1/2 weeks along.