Hi, Hagrid,
Welcome!
I'm not knowledgeable about CSF leaks at all but I'm assuming you are talking about a possible CSF leak.
Apparently there are a couple of other tests you probably should have since there's some doubt about the diagnosis:
Cerebrospinal Fluid (CSF) Leak: Johns Hopkins Skull Base Tumor Center
And according to this (Medical News Today, December 2019), conservative treatments should be tried before thinking about surgery:
Cerebrospinal fluid (CSF) leak: Symptoms, treatment, and more
I'm sure that others here will come along with some replies for you before long.