My daughter hasn't been nursing well since her doctor's appointment on Tuesday. That night she did…

My daughter hasn't been nursing well since her doctor's appointment on Tuesday. That night she did have lots of vomiting and what seemed to me like diarrhea. Took her yo the er and they said it may be a stomach bug, but she still isn't nursing well and she usually eats whenever I offer the breast to her. I'm just worried because now she's only have green poops and not yellow. Should I take her to see her GP.

P.s my husband and I got sick after she did as well.