I would concur with
@Rachox, a review of your meds, dietary and exercise is much needed if your blood sugar levels are fluctuating.
I can only suggest that unless something different is going on with another condition affecting your diabetes meds, could be causing the big fluctuations.
Usually, with those results, it is insulin resistance, coupled with a weak insulin response to the glucose derived from a meal that causes the high spikes, until the meds kick in to lower the blood sugar levels.
Talk to your doctor.