Is it safe for a diabetic female to drink urine ?

My girlfriend, who is a 35 y.o. type 1 diabetic, enjoys drinking my urine, she has recently been hospitalized, the cause being very high acidic blood (they got test results back that makes them think she drank anti-freeze). I was wondering if the practice of drinking urine would be the cause? We have been doing it for 7 months with no effects, and then suddenly she took ill after not doing it the last month, she also had dental surgery a week ago, where she needed 26 needles to freeze her. Could it be a build-up of the urine over time, or the dental freezing or possibly another cause to that condition? Thank you.