My 3 month old doesn't even weigh 10lbs yet. We have done Ll sorts of test for failure to thrive and everything is good. Just waiting for results on amino acids. We came to the conclusion she just needs for calories so I nurse her then give her an oz of formula after and it is working. We had a follow up weight check yesterday and the doctor said give as much formula as she will take. The last few days as it is she has been fighting me with nursing hardly going 15 minutes but will take the bottle no problem. We have been doing this for a few weeks now. I feel like I'm failing at breastfeeding and like my baby. Doesn't want me anymore. I don't want her on strict formula i don't know what to do.