A., i have to agree that breastfeeding is without a doubt the best , for you, for him, however, that is not to trivialize the pain or trauma that can be experienced by some women as nursing is established. I highly recommend finding a craniosacral therapist who can work with your sons latch....if there is pain, especially if one nipple hurts more than the other, if he prefers one side to the other....these are signs that CST may help....
also if the act of nursing brings up feelings of loss of control over your body, or other trauma triggers, please get some help, counseling, therapy, support...this is nothing to feel guilty about and a great opportunity for healing...i do work call somatic trauma resolution that is helpful for this kind of physical response....
another thing to look at, which is more information is that they are finding uncool amounts of melamine in formula...that is the toxic ingredient that made all those babies in china sick....so its really important to do some research....
all that said, if you made it to the bottom of this email....the herb sage in a tea will help dry up milk supply...
good luck mama,
A. Chavez, lmt, strp, bd, ccce
bhakti integrated therapies and childbirth services