If you suspect MS, then you should go see a neurologist. Most people try to find an MS specialist. That is who gives an MS diagnosis.
The typical tests may include: MRI of brain, c-spine, t-spine, evoked potentials (hearing, vision, extremities), a lumbar puncture, blood work to rule out other possible causes, and a thorough neuro. exam of reflexes and responses.
This is a website that discusses the diagnostic process for MS.
Symptoms for MS are extremely varied. The symptoms an MSers experience depends upon what parts of the brain and spine have been damaged. MS symptoms also are shared by many other diseases and disorders. It can be a long, drawn out process to get a diagnosis. People can go years before getting an official diagnosis.
Symptoms of MS may include: numbness, tingling, balance problems, vertigo, coordination problems, tremor, fatigue, vision problems, hearing problems, swallowing problems, bowel and bladder problems, spasticity, paralysis.