I don’t think your baby is over fed, you can track her weight chart and see if her weight is increasing around 200g/wk, if it’s increasing and baby is peeing well then probably no concern. The estimated total feed per day should be body weight(kg) X 150ml. My baby is 8weeks and around 5kg, drinking 90-100ml per 2hr |. Sometimes changing the FM that suits her tummy may help with easing the spitting.