You were prescribed Metformin and Gliclazide (Diamicron) if I remember correctly. You must take these as directed by your doctor. If you want to test which foods your body can cope with,
Test immediately before you eat
Test again 2 hours after the first bite of your food
Keep a food diary
Record your levels alongside the food
Try to keep any rise from before eating to after under 2mmol/l (36mg/dl)
If more than that, reduce the amount of carbohydrate in that meal.