I had my baby 5 1/2 months ago & my husband and I are always careful when we have sex ...this time we used a condom & it broke and he came inside ........I got my first period post part just this Saturday 6/3/17 and the last day of my period was yesterday obviously there is a possibility I could get pregnant right ?....I can take plan B but I'm breastfeeding and I don't know if that will affect my baby or my milk supply??