Had elevated sugar in my blood 18 months ago (fasting 8.1), It was suggested I could be pre-diabetic. No further tests until last week after sugar was found in my urine. My OGTT result after 2 hours was 20.2, I have received a letter from my doctor confirming I have diabetes mellitus and have to attend a diabetic clinic. My big concern is the result 20.2, it seems very high compared to what I can see on the internet and now I'm very worried. Has anybody else had readings this high as I'm now very worried.