Perhaps dont feed into it if she finds she is getting attention about her doing this she will do it more, focus on her positive side, some of these behaviors can go unnoticed so let her do them do not ask her or respond to them, you can also try distraction , and get her involved in activities she likes so she isnt so anxious, we all worry about our children and it normal for you to, maybe she has picked up on this.Let her go her own way and speak to a child when she wants to do so , give it time .good Luck