You have to take a certain amount of medication for each amount of food that you are eating, and then the medication will keep the blood sugars from getting to high.
You might want to read this book, it talks about why everything is out of wack, and how to make the medications work better.
Dr. Barnard's Program For Reversing Diabetes.
You can get it at Amazon or Border Books, and other places.
You should also get a A1c test, and then in about 6 weeks see if it has improved. The Dr. explains it in the book - 4 pages of stuff.