During the time that your baby is refusing to nurse, you will need to express your milk either by hand or by pumping, in order to maintain your milk production. Do this as frequently as your baby would normally nurse. If your baby has refused several feedings, you can offer your expressed milk in a cup. Avoiding bottles and pacifiers is recommended during this period in the hope that your baby's sucking urges will encourage him to start nursing again.
Spending lots of time skin-to-skin with your baby can be very helpful. You can also try:
Questions cover 6 weeks to one year