I'm sorry to hear this - my daughter was the victim of bullying earlier this year and it is a very worrying time for both the children and the parents. See
here
What are the irrational fears she is displaying?
I assume she has been referred to CAMHS for a mental health assessment, regarding the OCD? Is there any indication what sort of therapy they will be using/recommending?
It is a difficult subject to understand and continue to be patient with, as unlike a broken leg or physical injury where you can see her pain and have an expected recovery time scale, the pain and fear she is experiencing is non visual to you, but is very real to her. This is when it becomes very frustrating for you, especially when a child is not able to communicate thier feelings effectively.
Is she an only child?
Does she hve many friends, and is she involved in many activities/social life outside of school?