Well, they think I am predisposed to having D because of family history. A couple of years later and I have since been diagnosed with Type 2. I am still on the fence about going back to the endo and getting a clearer diagnosis again though, since I am in my 30's, with normal blood pressure, only 2 or 3 kilograms overweight and have very low cholesterol.
I must admit my experience of older doctors has not been very good. The first specialist who diagnosed me did no tests at all. I remember begging him to do the HBA1C. This time around I started with a regular doctor who took bloods and did the HBA1C straight away, without me even bringing it up. I think a lot has to do with when the doctors were trained, because so much new research has occurred since then.
For me, the effects of the prednisone lasted at least 6 months. I'm glad to hear your blood sugar came down faster!