I started the mini pill (progesterone only) on the first day of my last period. My OB said that would help reduce spotting. Well, I had a 7 day period and then started spotting 4 days later. I'm guessing it's because of the mini pill? If this happened to you while on mini pill, how long did it last?

(I'm not breastfeeding, but using the mini pill rather than full hormonal birth control because we are not sure of whether we will TTC again and don't want to mess too much with my hormones).