I agree that this should be a new thread. Welcome to YT
So sorry your baby is feeling bad and that all the tests show no cause.
Does she throw up food or just foam and bile? If it is the latter, could it be an acidy stomach and gastric reflux? If it is the former, could she just be eating too fast and regurgitating? When does she do this and is she hungry afterwards?
I know all questions and no answers!! Hope you find a solution soon.