arg you poor thing. well, if
you get the same workup as i did, it's a pretty short list of four things to mentally prepare for:
-evoked potential tests [not a big deal, first you stare at a flickering screen with some stick-on wires measuring how fast your brain deals with visual info; they use an instrument to poke at a nerve in your knee (from the outside) for the sensory part of the test]
-bloodwork (one pinprick gets them a LOT of information - they take some vials and look at chemistry - that's where the b12 test fits in - haematology, and coagulation)
-lumbar puncture (they test the fluid for the presence of certain elevated proteins and also for 'oligoclonal bands' which are indicative of chronic inflammation)
if you think the spinal tap will really freak you out, at least you know that you can't see
the needle what with them being behind you and all. if you tell them to make sure to freeze it enough that you don't feel it either, it's easier to stay calm. i made my neuro freeze me twice because i was freaking out at even the slightest dulled sensation of the tap being done. once i had the extra numbing it was waaaaay easier to stay calm.
you can do it jules! knowing is half the battle, as they say