I drank approx. 10 oz of 10% alcohol wine and had to provide urine for an EtG lab test 91 hours later. I am 53 yo female, 190 lbs, fairly sedentary, insulin diabetic. Assuming the test cut off would be 100 ng. Do you think the rsults wll be negative?

Yes..

Yes but what if you don't get 91 hours the next time. Consider your consequences.