Hi,
Welcome to the ehealthforum. I am glad to help you out. The blood sugar levels that you had measured are post prandial levels and are not significantly raised. Moreover you had food after a whole day of not eating anything and the symptoms seem more likely to be due to hypoglycemia rather than panic attack.
First of all take regular meals and avoid skipping meals for long intervals. If the symptoms persist then I will suggest you to get your blood sugar & glycated hemoglobin checked.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.