Thank you all for your responses.

I have brought Liza Jane's charts to the last 2 neurologists I've seen but they don't see the need for further testing.

I don't like the idea of giving up my search. It's like giving up the little glimmer of hope of getting the proper treatment for the underlying cause and not just masking the symptoms.

I have another appointment with a neurologist on the 17th of September. Hopefully, he can find some answers.