Late Period!!!!

Vicky
Hey I'm a first time mom to a six month old baby girl, I'm breastfeeding and I've been reading that breastfeeding at times works as a contraceptive. I've had my period on its regular cycle for the past 5 months except this one I'm 2 weeks late. I'm scared that I may be pregnant. Has anyone else gotten pregnant while breastfeeding a newborn or toddler?