Low blood sugar levels. Hypoglycemia?

Snice, last 15 months I m suffering from weakness, fatigue, dizziness throughout the day.These symptoms are more in morning . I had to eat frequently to keep these symptoms on control if a meal is skipped these symptoms will increase . I had undergone various blood test like LFT,KFT,SERUM ELECTROLYTES , TOTAL PROTEIN ,S.CORTISOL etc which alll came to be normal except the blood sugar levels which always came to low or near lower limit --- Fasting sugars -74,70,66,62 are the figures that used to came in various blood sugar test .   Inspite of taking high carbs and protein diet for months these problem is not getting cured PP SUGAR - 81,78,74 , 75 are the figures that used to came in various blood sugar test. Inspite of taking  high carbs and protein diet this problem is not getting cured and also eating sweets do not increase my blood sugar levels . Plz help me as this problem is eating away my health and my career . Plz help !!! Is there any cure or medicine for hypoglycemia?