I take your point Mark but usually my intuition is correct with my body. I am a scientist by profession (medical physicist) so I know how it can get with self diagnosing over the internet. Really what I am after here is anyone with whiplash/head trauma that was then diagnosed with a CSF leak and just how were they treated. The one you are describing is a different type of spontaneous leak that is only sometime associated with head trauma. This is an interesting abstract to look at.

Epidural blood patch therapy for chronic whiplash-associated disorder.
**edit**
I am considering trying a short course of oral steroids as a first attempt to get this under control. Getting a contrasted MRI or a CT is fairly risky for your long term health and I will only go down that route if I need to. Hence my question to anyone here, has anyone with a CSF leak been successfully treated with steroids? And of those who had whiplash?