Today, 09:47 AM
Hi, I am sorry I do not have a lot of time to post, so I am going to skip much explanations and just give suggestions.
No matter how much milk you are able to pump, you can give that to your baby in a cup or bottle. If baby will not take it that way, mix it with her food.
Babies do not "wean themselves" to FORMULA. Because after all that is not really weaning. What is more likely is baby was eating so much in solids, baby lost interest in nursing. Also, the situation may or my not have included a nursing strike where babies suddenly start refusing to nurse. Neither is the same as natural or spontaneous weaning. Of course it is possible that at this point you baby will not nurse again, there is no way of knowing about that, but there is lots you can try to encourage nursing.
Solids are not nearly as calorie rich as breastmilk, so solids replacing breastmilk in large amounts alone would have caused a weight plateau. Additionally, when a baby is eating lots of solids, baby is usually drinking lots of water. Water of course has no calories, while breastmilk, which is just as hydrating, does. So again, this would act to a slow down in gain, because baby is nether hungry nor thirsty enough to nurse normally. Of course, at the same time, baby reducing nursing would act to to reduce milk production.
However, a gain plateau at this age is not necessarily a problem, especially since baby has been growing taller. I strongly suggest the book My Child Won't Eat. by...