its better to take iron and calcium supplements till six months after delivery .better to a prescription from doctor. do light back exercises for back ache u will find some on net.

please consult ur doc n take the calcium.Check ur posture while feeding ur baby.Sit straight with back support and lift ur baby to ur breast, place a pillow to support ur hands.Many mothers bend their back while bf which is the main reason for backache.Try to bend ur knees while reaching floor( not to bend back) ..