baby 27 days old

hi everyone. im a ftm. my baby is always vomit after feeding. sometimes i already burp her and sometimes so hard to make my baby burp. i always have to lie her on higher and to the side so that the vomitted wont go back in if she lay flat. and the vomit sometimes 30mins or 1 hour later after feeding. i met paed yesterday she said stop eating dairy food for now. im always worried esp during the night .. qnyone had the same issues?