So up until about 2 weeks ago, I’ve been exclusively breastfeeding and pumping for my 12 week old. I started supplementing because it seemed as though she was always still hungry after I feed her even 3 oz bottles of breast milk when she was 1 month. So I started out with 1 bottle of formula mixed with breast milk a day, she threw up for the first time just a little bit after that. I slowly started to give her formula by itself twice a day. Now she’s throwing up constantly, it’s scaring me because she never threw up when I was giving her bottles of breast milk or breastfeeding her. Any tips or advice ? Thank you.