Suggest Treatment For Numbness In The Feet,dizziness,blurred Vision

For more than a month now, I have been having a sensation of numbness in my right foot. At first it was sudden onset, but now it is constant. It is a sensation as if it is not a real foot. I have also been experiencing sudden extreme thirst, dizziness, blurred vision, feeling of faintness/weakness, nausea, soft stool/diarrhea every few days, some disorientation/loss of concentration, and soem loss of balance. At first I thought anxiety, but it has been constant for too long. What can this be?