When you say you've been scared into doing quarterly checks, is that just because of diabetes or was there anything else that triggered the extra concern?
My endo requires an HbA1c every six months, since that is the Medicare rule to have him continue to write my prescriptions for insulin and testing strips. He said otherwise he'd only require it once a year because my diabetes has been so stable and I've been able to estimate my A1c almost right on every time since on insulin.
My PCP requires most of the other tests every four months and has been ordering an ultrasound of the left carotid artery every two years since she discovered a bruit eight years ago. Just the left, though. And so far they haven't found anything more significant in that test. My next test on that isn't until December, but I'm slightly concerned that they might find something more this time, as my blood pressure has increased quite a bit in recent months.
Let us know how your tests come out. Hope all will be well.