Astrology is more than just your horoscope and your sun sign. The energies of the planets have a profound impact on everyone. Besides being the auto pilot of the universe, there are aspects of astrology that can be used on a small-scale as a tool to do inner work.
If you have a birth chart, make note of the degree and sign your moon is in. The moon represents past emotions, and every month as the moon returns to this position you have what is called a lunar return. Metaphysically what is happening is that the energy of the moon resonates with a suppressed emotion.