I was diagnosed in 2003 and the doctor I had then never once mentioned to me the importance of controlling my blood sugar readings. He also did not tell me that complications can happen if blood sugar is not well controlled.
I've been lucky in that I've met diabetic people in the online community that have been kind enough to share what they know about counting carbs and the importance of good control. My last A1C was under 6% for the first time ever. I don't think my next one will be so good.
Recently I saw my pulmonologist for my yearly sleep apnea check up. He ordered a CMP (complete metabolic panel). The results of the GFR portion of that test indicate that I have kidney disease. Every time any of the doctors I have had over the past 10 years have ordered blood work, they just say results are normal. None of them ever advised me to see a kidney doctor. I'm so disappointed with my own ignorance because if I had known better, maybe I could have delayed this complication. :(