If I were in your situation (which granted I am not) and mood swings related to blood sugar was a concern, I would pick up a simple finger-prick blood testing kit. It is fast, safe and most of all very accurate. That would then either put my mind at ease or convince me to see a doctor.
Again, having what might be very inaccurate measurements of blood sugar won't help in this case either, I fear.
Just my two cents, but as a type 1 diabetic: I either want very accurate blood sugar readings, or none at all.
And from what I know about people who don't suffer from diabetes: there is almost no reason to try and find out what your blood sugar is doing, because your body regulates it so well.
So I just don't see the point of this. Non-invasive glucose monitoring just doesn't seem feasible, the accuracy doesn't help diabetics and it certainly doesn't help non-diabetics.
I'm a naysayer on this, but I do hate having to continuously test my sugar and buy expensive CGM gear. Please prove me wrong?
Again, having what might be very inaccurate measurements of blood sugar won't help in this case either, I fear.