Ok Chris, let's look at the info you've provided, there is conflicting info so as diabetics, perhaps we can advise. Sugar=carbs for us, they have the same effect in our blood. If you were type 2, you would definitely not need coffee with loads of sugar to keep you going, that sugar would have the opposite effect - I think you may be confusing types here, it's type 1 that might need a substance with sugar in if their blood levels drop low. T2 has too much sugar in the blood. Secondly, adrenaline had nothing to do with T2 so that doesn't fit.
Lastly, you cannot possibly self diagnose, it doesn't work like that. As I explained before, exercise alone would not give you a non diabetic result, no matter how vigorous. I'm not sure why you think that a diagnosis of T2 means insulin, it certainly doesn't. Diet is an extremely common way of controlling our diabetes, sometimes medication is added - insulin may be used when other measures have been tried and have not worked.
You honestly cannot say you are diabetic as the info points in another direction. Buy a meter and strips ( less than £15, look for SD Codefree) and test 2 hours after each meal - you will soon know if you're diabetic or not. My guess is, on the info you've given, you're not. Sorry, but just because you think it, doesn't make it fact. So, I guess that is why you are getting a hard time here - you are well intentioned but ill informed I'm afraid, advising from the perspective of experience with diabetes, when you don't actually have it.