Your breasts may hurt because they're engorged with milk (they feel heavy and sore). You can ease the discomfort by letting your baby nurse. You can also express some breast milk for your baby to drink from a bottle and let dad do some feeding. Standing in a warm shower can help relieve engorgement pain, too. If you've got the opposite problem—you worry that your body's not making enough milk—nature's solution is the same: get baby nursing. Your body will meet the demand with a greater supply. (A side note: The size of your breasts has nothing to do with how much milk you can make; every woman has enough milk ducts.)
While you breastfeed, your body will need extra calories to burn, so try not to drop a lot of weight by cutting back on food. Continue with the same kind of balanced and healthy diet you ate during pregnancy (including eight glasses of water a day), and continue taking prenatal vitamins as long as you breastfeed. You might also want to watch your caffeine and alcohol intake (if you use either more than occasionally, discuss it with your doctor). The only thing you should consider absolutely forbidden without your doctor's permission is any drug or medication. Some have the ability to pass through breast milk and harm your baby, so be sure to get your doctor's okay.
At this age, you can expect a typical feeding to last between 10 and 15 minutes on each breast. Your newborn should be facing you, tummy-to-tummy. Put a pillow under baby for support. Encourage baby to open wide, then quickly move your baby toward your breast until the entire nipple is in baby's mouth. Many new mothers report that first feedings can be uncomfortable, but a lactation consultant can teach you ways to make it better. For instance, you'll learn how to splay baby's lips open wider, express milk before nursing to draw the nipple out, and massage your breasts after feeding.
Baby will need to be burped at least once per feeding to help get air out of his tummy. You can either sit him on your lap and rub or pat his back, or do the traditional over-the-shoulder hold. You shouldn't need to pat too hard to get some air to come up.
Our parenting advice is given as suggestions only. We recommend you also consult your healthcare provider, and urge you to contact them immediately if your question is urgent or about a medical condition.