Vomiting in a dream usually points to release -- your mind expelling something toxic, whether that's a feeling, a relationship, or a situation you can no longer keep down. It can reflect rejection of something that doesn't belong in your life anymore, and the relief that follows once it's finally out.
We shall not ignore the 120 conjunctions that occur between the planets, because in them its almost the whole knowledge of what happens in the world of being and corruption. - Ptolomeus