hi noah and welcome to NT,
i would think that within the VA system you could seek out a 2nd opinion. even a good neurologist could give you that.

i also would get copies of the test results and the mri in case other drs you see will want to review it all. i'm a big proponent of starting your own medical file. down the road you will be glad you have it.

it does take some time to dx (diagnose) MS. it's also a process of elimination, eliminating other diseases. that mean labwork and serial mri's (mri checks down the road).

follow thru with this dr. at least he's willing to see you and do another mri.
in the meantime keep a sx (symptom) journal with the date and the sx you have. you might also consider seeing a neuro opthamologist if you have any more eye problems. opthamologist's have been able to dx MS IF they see certain eye changes.

hope to hear how you are.