I was in the same boat, talk to Dr. about it, I made the decision to start insulin and it worked out fine. I was scared at first but with the new pens that they have it is really easy. good luck
Never adjust your medication without first consulting with your doctor. Doing so may cause unexpected low blood sugars resulting in seizures, confusion, loss of coordination, loss of consciousness, coma and even loss of life.
With levels of 200-300 mg/dl your doctor may start you on insulin, either fast acting or extended release. This may or may not be in combination with Glipizide. Good luck -