Now is now and now it's gone. The next now is just coming and passed at the same time. Now lasts only a flash of time and at the same time now is always.
Yes! An analogy: You are in a train, the train passes the landscape. The landscape circles around the sun. Your train stops at the station. There is another train, standing. Suddenly the other train starts, and for a fleeting moment you think it was your train that started. According to Einstein that possibility cannot be ruled either. We cannot say if A moves in relation to B or B in relation to A. Now is a movement or an object of movement. It can be either, never both.