Pregnant on mini pill

I’ve been on the mini pill since I’m breastfeeding my youngest still. Well my period has been all over the place but I just got a positive pregnancy test. I’m completely freaking out since we were set on being done having babies 😳😳😳

I’m so scared to tell my husband. This will be baby 4. Idk how this happened as I was so diligent on taking my pills on time every day.