One defunct breast
My right breast seems to be producing almost no milk. I've been breastfeeding exclusively since my baby was born and he is now 3 months and 3 weeks old. I've also tried expressing at least once a day. When my baby latches on my right breast, he releases almost instantly and screams. I'd continue trying for at least a minute before giving up and offering the left side. Meanwhile, my left breast is almost 2 cup size bigger than my right one. I didn't think this was going to be a problem until his doctor mentioned that his growth rate has declined and suggested I feed him formula. I'm trying not to but feeding my baby from only one breast has left him screaming for more, especially in the evenings. Help!
Re: One defunct breast
This link covers lopsidedness and what to do about it: http://kellymom.com/bf/got-milk/lopsided/ Basically you want to increase stimulation to the underproducing breast until production on that side increases. This can be difficult to do when baby hs a strong preference for the high production side. Try different positions, try offering the smaller side first, try offering it at the end of feedings, and if the baby won't do the job on that side, pump every time he refuses.
Can you post a complete weight history for your baby? Maybe we can reassure you. It's completely normal for a baby's growth rate to vary, with the most rapid rate of weight gain in early infancy, and declining throughout the first year. (That's why the growth curves are CURVES, not straight lines!) Many babies will drop percentiles in the 4-6 month window, and particularly active babies may begin to drop percentiles earlier.