Pre-Diabetes is the state that occurs when your blood glucose levels are higher than normal, but not high enough for a diagnosis of diabetes (According to American Diabetes Association).
Symptoms may include the following:

• Extreme hunger
• Always thirsty 
• Frequent urination 
• Slow healing wounds 
• Light headed 
• Fatigue 
• Unexplained weight lost

Keep in mind for some people Pre-Diabetes has no signs or symptoms.
Its important when you visit your doctor to ask for a simple blood test for a base line to monitor your blood sugar levels.
If you happen to find yourself with Pre-Diabetes there are some simple remedies you can follow with great results.

• Cut all processed sugar and foods out of your diet.
  (especially High fructose corn syrup) 
• Eliminate grains.
  (breads, pasta, cereals, rice, potatoes, and corn) 
• Walk at least 30mins-1hr three times a day if possible.
  (to lower your insulin and leptin resistance)
• Take two tsp of cinnamon tea two or three times a day (use organic powder cinnamon)
• Optimize Vitamin D level.
  (15 to 30 minutes of direct sunlight should do the trick)

Do the above steps for at least one month or until your symptoms subside.
Should you decide to take oral Vitamin D supplement it is important you get your levels tested regularly to make sure you're not reaching toxic levels, and are within the therapeutic range.
The root of the problem of diabetes is insulin resistance, with bad leptin signaling, caused by mis-communication within and between cells, related to the communication between the cellular receptors for insulin and leptin.
As sugar spike in your body insulin is release to gather the excess sugar and store it as extra energy in the form of glycogen and fat (mainly fat).
These excess blood sugars will only worsen the resistance and communication of leptin and insulin.
Exercise is vital in reducing sugar levels in the body by using the extra energy your body stores, also you lower the amount of insulin levels in your body, at the same time increasing leptin communication and lessen insulin resistance.
Foods you eat need to be adjust to your activity level and your bodies metabolism, if for some reason your body is not metabolizing blood sugar normally you will need to cut out foods from your diet that your body will react to by creating insulin, this means all types of grains and sugars even healthy grains like whole, organic grains.
Cinnamon is a natural stimulant of metabolic communication and may help lower insulin levels, also aid in lowering blood sugar levels.
Optimizing Vitamin D aids in the improvement of diabetes and may even cut the likely-hood of getting type 1 diabetes recent studies have shown.
Its important to consult with your doctor before tying any new vitamin, diet, or exercise when taking any medications.
If the above does not work, you can also take a herbal formulation called Eleotin its has been study for over 20 years in Asia and, it is highly effective in the treatment of all stages of diabetes.
To learn more about Eleotin just follow the link below.
I hope you find this information useful and help you to overcome your Pre-Diabetes, or any diabetic symptom you may have.
I wish you well.