Hi Kiz,
Welcome to NT.
What I think is:
You may have to wait until more symptoms occur. I know it's hard to get a dx in the UK, especially with clear testing. I never heard of "Functional Neurological Problems."

He is stating you do have problems, so why can't he give you medications at least for the symptoms? How about seeing a MS nurse? Will your MD refer you? If you have anymore difficulties you should go to the ER (hospital) and maybe then you will see a specialist to sort out these problems.

I know your waiting lists are long, I have friends in the UK. Good luck to you and nice to meet you.