The numbness and blurry vision are symptoms that people with MS can experience but they are also symptoms for so many other illnesses and disorders. Obviously no one can offer you a diagnosis here. I have included a link that might help.
I'm not sure what you mean by numbness in your spine, and I have not heard about sharp pains in one's head in different spots. What has your doctor said?
The most common test to begin the diagnostic process for MS is a brain MRI. Good luck. I hope the link is helpful.