How did you feel leading up to your first postpartum period

Ka

So lately I've been having vivid dreams and my supply has gone down. I was thinking maybe I was pregnant but the pregnancy test determined that was a lie. I am thinking maybe these are signs of my period coming back. What was everyone's experience when they got their pp period back? Nursing or formula fed? My husband is thinking that my bubs may be weaning early but im not too sure about that theory.