Alignment and balance. You may be ready to open and seek old dormant energy in the body and release it. You may also be experiencing a kundalini awakening and a deep or a very “real” spiritual connection while sleeping. Rocking also indicates a comforting time in life where things feel safe and aligned. Rocking in general can be a gentle way to raise your vibration.
See Balance, Kundalini, Meditation, Energy, Chakras, Chair, Glider.