What Causes Left Eye Blurred Vision, Numbness In Fingers And Severe Fatigue?

I am having blurriness in my left eye,for about a week now. I had it about a month ago,and I thought it was because I was off my vitamins for a week,so when I started retaking them,it completely went away, no reading glasses nothing. I am also having numbness in the tip of two right fingers off and on since the blurriness came back,and I had been having a stiff type of hurting in that same hand. . I was very fatigued and tired for a week,but that has stopped. I thought it might be low or no iron,because I realized my vitamins didn t have any,so Ive started taking a vitamin supplement that does have iron. When I was going through the tired phase, everytime I stood,I felt I had to stretch or yawn. I had also bee having headache/pain on the left back side of my head. Can you tell me what is going on?