This is nothing to worry about, how did you find out about it? First off you can not do anything about it directly, family is the worst option as you become a constant remind to her. She will know you know everything and it won't go away except draw her away further. She is young so you don't have to worry too much.
Seek people you know outside of family friends that had their own anxiety issues to talk to her. Do not do it directly. I am telling you that is the answer. The stranger can go away and everything your daughter says will go away and from her point of you, she still has you without constantly worry what do you know, what do you remember are you only doing this because of X, Y,Z
Do not allow anyone to ask what if questions, is the healthiest way to keep someone healthy. They looking for certain answers. Death being the only certain answers.
What you can do is print out worry diaries. Make them up in word make a pad for her. Put it in the room and ignore it let her use them
1 worry
2 feelings
- %age of feelings
- What's the likelyhood of this happening
- Now how do you feel
6.how much is the worry
Example
- Eating too much sugar I will die
- Panic anxious
3.1000%
- Why would I die from sugar, would be a sweet death
- Peace
- Worry what worry oh drats forgotten my homework!
Occasionally check it if you want I get it parent you want to protect. However the lightest of touches do it without her really knowing you are doing it.
This will work
From what you say I can tell you her core fears is fear of losing control and fear of death so her symptoms little fears. If you find out the main reason that hurt her to become that afraid it goes away.
Lose of grand parent, i.e or sudden death something traumatic she lost control etc.
This maybe one very good reason - you as family can not be involved because you want to nature with love naturally, when I the stranger would have told her. Your being stupid you can't die from sugar. Then go away she be angry at me having found out for example she saw Daddy hurting mommy. That embarrassing moment go away and the family is protected.
Air the dirty laundry