Spit up is a large amount!

Hi mommies! I am 3 weeks PP. My baby girl feeds great when I nurse her, but almost every feed she doesn't spit up but vomits. Or idk if it's just large spit up. She doesn't seem fuzzy but it concerns me bc even though after burping her it never fails. So then I can't even be at peace laying her down bc she is always spitting up large.. any recommendations ??? I am a first time mom & they recommend leaving dairy which I've seen a slight improvement . Any other suggestions???