MRI Results "Normal" = No Further Action Required. What are my next steps?

On top of that, I called the hospital today and they've extended my referral waiting time from 6 months to 10+ months, meaning I will be lucky to be seen come August now.

I'm going back to my GP (UK) tomorrow, what are my options here? What can I tell them to make them see SOMETHING is wrong? Both CT and MRI came back "normal".

Can I request an LP?
Do I just walk into A&E -again- and hope someone deals with me quicker?

Ideas and thoughts are greatly appreciated, I'm at an absolute loss now, and clearly shite at advocating for myself.
TIA