Diarrhea: Born free

How to handle a gassy and fussy newborn while nursing

I have a 7 week old baby girl. She has been extremely gassy and fussy since she was born. She was 3 weeks early and since she wasn't breastfeeding strong, I had a hard time bringing my milk supply up so her pediatrician put her on formula as a supplement to get her weight up. She still is breastfeeding and supplementing with formula but I am having the hardest time trying to figure out which formula to keep her on. We took her off of regular similac advanced and switched her to similac sensitive but she is still very gassy and her gas is...