Mama, I'd really suggest checking with your OB or pediatrician about any vitamins or supplements right after giving birth, lalo na kung breastfeeding ka, better safe than sorry!
A few of us mums have asked our doctors before taking anything new postpartum, kasi may effect sa baby through breastmilk, so it's best to get the go-ahead from your medical team muna. Congrats on your baby, by the way!