We do dream what has been in our subconscious mind or what we have been talking through out the day. Maybe in your subconscious mind there is something going on about pregnant or having a pregnant test. You may have been wanting to be pregnant or fearing to be pregnant. Another thing is you may have talked to someone, watched or heard some where people discuss about pregnancy and you can not remember it. Some people believe if you dream of being pregnant then one of your friend will be pregnant.
Dreams do occur and sometimes they do have meaning, but in general they often involve things you have on your mind. More than likely this is Yhe case for you. It is possible that your dream has meaning, but only One knows that for sure. Pray and ask God for guidance and wisdom.