Had my son 34+2 weeks and he stayed in NICU for 14 days mainly for feeding. His birth weight was 3lbs 9oz, when discharged he weighed 4lbs 1oz since discharged he's lost 30grams. Now you may say this isn't alot however, I am terrified he'll continue to loose weight.

He has begun to throw up and I'm actually at my wits end worrying. Does anyone have any tips on how to help baby gain weight?