My initial visit with the neurologist in 1982 was quite short too. My neurologist told me that he knew I had MS at the first meeting, but had to wait until the tests made it official. (He used his leverage to get me 3 days of inpatient testing.)
Though you may be disappointed, you need not be. Finish the tests as needed. The blood test, in my non-medical opinion, will provide the evidence. The MRI may or may not show anything depending on the actual number of lesions.
I would consider you to be certainly blessed!! Smile, 'cause the light at the end of the tunnel is sure getting brighter!!