My daughter did it regularly and is 8 now and perfectly fine.. she did it so much after a feeding we would have a cloth handy under her chin to catch it. I was informed that some breastfed babies still overeat, and it could also be a number of things, or nothing. As long as you continue to feed baby as needed, she will be fine but if you are worried you can always contact doctor.
Following my boy skills a yogurt like texture liquid