No you are not Diabetic, wrong diagnosis first time and uselessly given Metheringham. Why was HbA1c done in first place?
Your HbA1C is absolutely normal but why was it done? Were you told to have this test, first test is Blood Sugar both fasting and Postprandial which means 1/2 after breakfast. Do you have anyone in family with Diabetes? Dad or mum? Do you have any symptoms? Extra thirst or hunger? These are important questions before your diagnosis
your current numbers are not diabetic. Your 2 hours post eating results are only slightly high.
Seems that you are not currently diabetic. Please continue to watch your diet (lower carb and avoiding sweets best), manage weight, stay physically active, and monitor a1c regularly.
When you were diagnosed, did they do a fasting blood glucose?
To diagnose diabetes, your A1C has to be 6.5 or higher, or your fasting blood glucose (blood sugar) has to be equal to or greater than 126 mg/dl (7 mmol/l). This test has to be taken when you've fasted (not had anything to eat) for at least 8 hours.
Perhaps your A1C levels were at pre-diabetic levels, but your blood glucose levels were higher. It sounds like you've been doing really well, though, but you should talk to your doctor, though, because since it's already been high, you need to keep on top of it.