I'm not an expert, but I know you are your own best advocate, it's time to call your doctor and get back into see him, I'm personally in limboland also, but I've jumped on my own bandwagon and am beating my own drum, since then, my primary doctor is agreeing with me about finding out what is wrong.
My problems started in 2007 (I remember the exact day, b/c that's the same day I lost my job)
Right now, they aren't sure what is going on, I'm one of the 15% of RA patients who don't display the RF in my blood, when my problems started, my WBCs and platelet count was 3 times normal, but they couldn't discover where this problem was coming from.
Welcome Back! I too experience many of your symptoms, the newest for me began 2 days ago, when I began experiencing sharp pain shooting through my right eye from bright light. (I also had a grand mal that day so not sure if that's MS related or not either)
These symptoms are in line with neurological problems, but not necessarily with MS. To get an idea of what the radiologist looks at to diagnose MS, you should take a look at this website:
http ://www.radiologyassistant.nl/en/4556dea65db62
You can see that the lesions associated with ischemic damage are a little different from those associated with MS. Ischemic damage tends to be sub-cortical.
This doesn't mean that you don't have MS, or that you do. It just means that it's hard to say at this time. I would continue to talk to the neuro and at least receive treatment for your symptoms, even if you can't get a diagnosis at this time.