With an A1c of 39 you are bang normal, so as you say not diabetic. Everyone's blood sugar fluctuates depending on a number of factors - food, illness, stress, activity etc. There's also the "dawn phenomenon" where a lot of us experience comparatively higher BGs on waking which then fall, without other intervention.
You don't say what your actual readings are, so I don't know what you mean by high-ish. Also - I'm assuming you're using a fingerprick monitor? They have some degree of error, usually taken to be up to +/- 15%.
The other thing is that nobody on here can or should attempt to diagnose. Not that your current A1c gives any cause for concern as far as T2 goes.... but if you are anxious, please discuss with your doctor.