Yesterday, 02:05 PM
I strongly suggest getting a second opinion. The first thing I would do is make very, very sure there was no scale error. Does your baby seem to you as if he weighs exactly what he did 2 months ago? What about other growth measures?
Next, even if gain is not happening, it is simply not true this would be because your milk is not nutritious enough. If your baby is not gaining weight, it means either 1) Baby is not getting ENOUGH milk to gain, or 2) baby is ill or has some serious medical condition or nutritional deficit. The quality of breastmilk vs. formula is not the issue with slow gain.
If you can, see a board certified lactation consultant. (IBCLC) She can help you figure out if you have low milk production or if there is an issue with baby not being able to transfer milk normally, or what. If you give us a full history of weight gain and nursing frequency, as well as noting any reasons you might have low production (birth control, supplementing without pumping, pacifier overuse, using nipple shields, etc.) we might be able to help you troubleshoot. But a baby not gaining any weight between 2 and 4 months is a very serious issue, and seeing a professional who can help you figure out what is wrong and how to fix it while supporting breastfeeding is important. That is what an IBCLC should be able to do, and unfortunately doctors are not trained in typically. See this for more: http://cwgenna.com/lconsult.html
If you supplement with bottles, you need to pump...