What does it mean if you dream that you are pregnant and don't who the father is?

If the dreamer is a sexually active female of childbearing age, the dream could be an early sign of pregnancy, and the dreamer should obtain a pregnancy test as soon as possible. Otherwise, dreams about being pregnant generally refer to an idea or project that is being developed by the dreamer. In this case, not knowing the father suggests that the dreamer does not really know where the idea came from, or perhaps does not know the origin of the project or assignment. See the attached link for further information.