[wanna be a young mother]

I just can't seem to get a FULL night sleep! I must wake up 3 times during the night. Then I'm up for like an hour before I can finally go back to sleep. It's not b/c I have to pee though that is the reason I get up at 7am b/c I cant hold it any longer. I just kinda wake up. I am having a hard time finding a comfy position to sleep in which I think might be the reason I'm waking up so much but I'm only getting 5-6 hrs of sleep and then I stay up all day and take a 3-4 hr nap in the afternoon! I can't keep doing this b/c it makes a mess of the rest of my day! Uhhhh...am I alone or is this another pregnancy thing? I just feel like I can't get enough sleep anymore and its driving me nuts! Should I talk to my Dr. about this? Anyone else up all night???