The dreams I had when pregnant with DS didn't come true... and I'm glad in part.
I dreamt that DS was a girl, and that she was taken off me. The first time I didn't know I had given birth and a cousin was looking after her. It was two weeks later that I found out! The second time, again I didn't know I had given birth, and I ended up stealing her from the nurses and running through the hospital because they told me I was too mentally unstable to have a baby...
But, you never know. And if the details in your dream are that specific it may be a sign