dreaming all night long....?

I'm 29 weeks and for the past few weeks I feel like I dream all night long. The most random of dreams. I fall asleep fine but when I wake up I feel unrefreshed like I dreamt the entire night. I feel so tired and kinda cranky the next day. I really prefer not to take medication. Anyone else have this? Any suggestions? I have older children to keep up with and this isn't cool. Need my refreshed sleep