She turns her head

Grace

Here recently in the last 2 weeks, my baby girl has started teething at 3 months. And since then she will let go, turn her head away and then come back. Unless I'm spraying milk down her throat she won't stay latched. It is like I'm fighting her to eat. I have been giving in and been feeding formula to her. Why is she doing this? Is it normal for babies to do this when they start teething??