The test showed I had a GFR of greater than 90 ml/min
Your
estimated gfr was over 90 so your kidney function was within the normal range. There is no kidney disease unless there is some other abnormality. In fact If the result said above 90 then you don't actually know how much above it was.
The calculation used takes both your age and gender into account . Without some other abnormality your wouldn't have kidney disease if it were at 60ml/min .
( abnormalities include protein in your urine or you have some other marker of damaged kidneys)http://www.renal.org/whatwedo/InformationResources/CKDeGUIDE/Stage1-2CKD.aspx
The first sign of possible kidney disease in someone with diabetes is likely to be protein in the urine.
People with diabetes develop diabetic kidney disease as a result of long periods with high glucose levels. Sometimes someone with T2 has had high glucose levels for a long time before diagnosis and may have problems when first diagnosed but the
quicker onset of T1means that there is not likely to be any damage to kidneys at diagnosis.
http://www.kidney.org/atoz/content/diabetes.cfm
If you are still worried about your symptoms then you should discuss it with your doc.