To dream of menstruation indicates that you are releasing your pent-up tension and worry. It signals an end to the difficult times and the beginning of relaxation. Some creative energy is being released or recognized. Alternatively, the dream means that you are denying your feminine side.
For women in particular, dreaming of their menstrual cycle when it is not time yet may indicate your anxiety about your cycle. It may sometimes signal an early or unexpected period.
(all text taken from dreammoods.com)
