Please tell me if anyone has had something similar. My daughter is on Gv…

Please tell me if anyone has had something similar. My daughter is on Gv, once she ate porridge and an hour later wanted to breastfeed, I gave her and it made her vomit right up to the nipple, she fell asleep and ate again and it passed, I stopped feeding her, after a couple of days I decided to give her vegetables and a little chicken, she asked for breastfeed again an hour later, I gave her and there it was again, we're all vomiting! Is she overeating or not digesting food? She's sleeping now. I have an ultrasound scheduled for the stomach but that's in a week only... I also need to see a pediatrician in a couple of days.