Lexi is 7w old now and on Friday we took her to the ER for an allergic reaction to the soy formula. She had a rash and started projectile vomiting. She had been constipated since we switched her formula and then her stools turned almost black, although no blood was present. Anyways, at her last appt at 4w she weighed 8lbs 2.5oz. On friday she weighed 8lbs 8oz. I know the scales can be off it really concerns me that in 3w she's only gained 5.5oz. I was told anywhere from 20g to 1oz a day of weight gain was normal in an infant, not 4g of weight gain per day. I'm hoping to get an appt with her ped to discuss the Cow's Milk Protein allergy, but as of right now I'm scared. It just doesn't seem good at all to me that her weight gain is so low. I mean she's still in newborn diapers and just now grew into 0-3 months clothing. Please pray we can get an appt and that it all goes well with her.