Failed 1hour Glucose Test.

The nurse called this morning and said that I failed the one hour test. The night before, I had a soda to drink at about 11:30 pm. I was suppose to start fasting at 12, so I thought that it'd be OK to do. Could the soda have affected my testing levels. Has anyone skipped the 3 hour test? My first pregnancy I passed the first time. I'm thinking about asking my doctor to retake the 1hour. I think I will be sick taking the three hour one.