Sorry but there isn't one. Think of magic as an aid nt a solution, it helps you to accomplish your goals and allows a greater variety of senses but it works on a scale of probability. How likely is it that everyone would forget you for a while or that you'll create a duplicate of yourself spontaneously? Not very, so a spell to this effect would take a vast amount of energy work that simply isn't practical or possible. Why do you need everyone to forget about you? There may be a split ion to what you want but this really isn't it.