Hi L., Have you asked your daughter whats bothering her and really listen? If your husband has been gone for months, most likely this isn't the issue.
Try to talk to her and found out what her fears are. No matter what it is, it's real to her and should be taken serious. Parents tend to mis-understand the situation and in doing so they dismiss the problem that is real to the child. There is a under-lying problem, but as parents we must listen, understand and no matter how unreal or silly it seems to us, it's not to the child. Make sure to validate your child's feelings or they may not talk to you about them. Never make a child feel that their feelings are not important. What's real to her should be real to you in order to help her.
Example: A child thinks there is a monster in the closet and you tell them there is no such thing as monsters, or that they are being silly. Instead of validating what she feels, you've told her that her feelings don't matter.
What I would do instead is this: When your child says, "There is a monster in the closet" it's real to them. So go over to the closet and open it and ask her where it is, if she says it right in front of you then demand the monster to leave, tell it that it's not allowed in the house ever again. You have now validated your childs feelings. Leave a night light on if necessary. So there's no monster to you, but that's not what's important, it's validating a child's feelings and letting them know your there for them. I've done this for a niece and it's worked. It made a big difference and so can you.
Love and Light,
Rev. G. Hudson, Reiki Master.
www.reikigailhudson.com