My clinic who has been doing diabetes research since 1923 would call you
diabetic. Why? Any two hour post eating reading over 120 is how they
define diabetes.
As someone mentioned earlier, get an a1c test (you don't need a doctor) and
if it's over 6.0 you're diabetic.
If you start testing your two hour post meal reading it will tell you what's
causing the problem and you're going to be really surprised.