Bach Rescue Remedy question?

I'm looking into White Chestnut, for "Unwanted thoughts, mental arguments", does that include repetitive thoughts? I'm pretty sure I saw on one site that it does, cant find it now though and if it does, does that also mean regular repetition from stress? or does it mean negative repetitive thoughts? I do need it for regular repetition, its driving me crazy and keeps me up at night and gives me headaches, so that would be great if it does! = P Thank you = ]