I agree you should see a doctor to check out possible causes.
From my own experience, one possible cause of the numbness could be stress. I had numbness and tingling in hands and feet, along with other symptoms, headaches, sore and stiff neck and back, shooting pains in my arms, shortness of breath and palpitations, and within days of making a decision which alleviated the long term stress I'd been enduring, I felt fine!