About 250 to 500 mg of Calcium in addition to your 4 glasses of milk should be enough to meet the nursing needs. I would certainly encourage continuation of your prenatal vitamins with iron. If your diet is rich in iron, and if you are not anemic, you do not need supplemental iron. In USA, no food is forbidden during breast feeding. On the contrary we believe, that mother eating all foods exposes the child to all different foods which is a good thing. Hair loss after childbirth is not that uncommon. It is mostly due to change in your hormones. Just continue to take your prenatal vitamins, and eat a healthy balanced diet, your hair should get back to normal soon. Congratulations on your baby.