You havent provided details about the dreams. However, after mulling over your post all day, there could be two possibilities:
Since you've mentioned that uve been practising, astral projection, you could have projected ur mind into a parallel dimension.
(is based on psychology)... While we may not remember a couple of things. All memory is stored in your subconcious mind. One such memory is perhaps associated with the image you drew when u were younger. Currently, certain incidents in your life are could be similar to that memory. Now pop psychology tells us that the subconcious mind plays up when we are asleep. So, chances are that your subconscious mind is trying to remind you of something.