My 6 week old baby has had 2 dark green stools in 24 hours, she is bottle and breast fed, she is also being sick after every feed, is this normal?

Push Fluids. If vomiting feeds, substitute who approved oral rehydration like pedialyte. Green stools can also be part of gastroenteritis in infant. Continue breastfeeding attempts. Monitor for s/o dehydration and watch for wet diaper at least every 6hr. If fever, dehydration or increased irritability, see md immediately.
Green stools. The green stools may be due to the iron present in the formula.If by sick, you mean she has loose stools after each feeding, this can be due the breast feeding.