I had a very vivid dream last night- what does it mean?

Loved your dream. The unconscious is represented in dreams as a great body of water, like the ocean. It is the great sea which gave birth to us. As we age, the unconscious begins to intrude into our lives. It holds many new aspects, which want to express themselves in the outside world (through us). I gather from your dream, that you might have had some reservations, some resistance to making some changes in your life, or trying new things. It looks like you've been won over, that you don't have a fear of the unconscious, nor view it as ugly or dangerous.