Mini-Pill Bleeding.. Period is that you?

Kimberly
I'm 9 months pp, 7 months on Mini-pill & breastfeeding. About a week ago, my nipples got really tender when I was pumping at work. I've been so hungry and bloated. Now tonight I am spotting. 
  
I haven't had any bleeding on Mini-pill thus far so kind of confused. Can you get your period after 7 months on it? Does that mean it's ineffective? Could I be pregnant?