How long have you had MS? It's common to have "residual" symptoms -- stuff that occurs from time to time, sometimes even continuously. Once the central nervous system is damaged, until they figure out how to repair it entirely, it's damaged, and you're going to experience symptoms.
Think of it this way: If you cut your finger, it's sore and works differently until it heals. But if you cut it again (or way deep the first time!) it's scarred -- and may never work "normally" again. The plaques are scars -- if they're small enough, they may not interfer with function. If they're severe enough, they may indeed cause problems.
Are you on one of the meds designed to slow (or stop) the progression of the disease? As for seeing a neuro -- I have had MS for 24 years, now. I haven't seen a neuro in the last 10. My primary care physician takes care of all my health needs, including anything relating to having MS. She prescribes and monitors the Betaseron, for example. She'll consult with a neuro if she or I have quesitons, but otherwise I don't see one. I haven't had an MRI in 15 years or so. They're a diagnostic tool, not a treatment tool. Once I was convinced I had MS, neither I nor my neuro felt any need to continue the expense or bother.
If I were to change medicine, or dramatically fail or improve, I might have one to see if there are changes...but otherwise, I just don't see the point.
Just my opinion, thoug!