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

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.