The dreams may also be age/hormonally associated. You are young, a woman, you are in many ways "pregnant" with your own new life, and aware (biologically & otherwise) that you can give birth. (I would ask if you are taking BCP for regularity/any reason only because I remember many years ago having multiple pregnancy dreams when I was taking the Pill, not making the association till I stopped)---something done/said/experienced probably triggered the dreams. Sounds normal though.