This does sound to me like PD my advice to you is go through the tests and let them do a MRI. My nuro is based in Sheffield, Proff Sharrack you could ask for a new referral to him I found him to be very straight & he told me within 10 minutes of our consultation he suspected PD all in all I was officially diagnosed within 5 months. He may well offer you some meds my advice is say yes then if they work you have your answer the drug he gave me was Pramipexole 0.088mg 3 times per day & it is designed to only work on PD & restless leg syndrome. I hope this helps & you get your answer soon I will be keeping a eye on this post to see how your doing. And I also agree ring the help line they are a great bunch of people and I have had the pleasure of even meeting some of them.
Best wishes & keep fighting.