Pregnancy/Chemical Miscarriage/breastfeeding

Sharel • Married since December 14, 2014.

I’m 9 weeks postpartum tomorrow. My husband and I had unprotected sex at about 5 weeks pp and I had a faint positive pregnancy test last Thursday at 8 weeks and a day pp but every test since either was lighter or negative. No bleeding my daughter is EBF. Midwife said to come in if I don’t start bleeding in the next week, but would I if I’m breastfeeding? I didn’t get my period back until 4 months with my son and that was most likely due to him taking a pacifier. Any other moms get false positives breastfeeding or gotten pregnant this early while breastfeeding?