A pregnant woman in a dream usually symbolizes new potential taking shape -- an idea, relationship, or project that's growing but not yet ready to be revealed. The anticipation in the dream can mirror real excitement or real anxiety about what's coming, sometimes both at once. Dreaming of pregnancy, even without any literal connection to it, often just marks a period of quiet, necessary growth.
The Moon answers those who are ruled by Venus, and Venus answers those ruled by the Moon. - Picatrix (Andalusia, ~1000.AD)