Yesterday at approximately 6pm, I had one single Margarita. It was not a strong drink at all, in fact I am a 5'3 female (who is a lightweight) and weigh 130 pounds and did not even catch a buzz. Today at 4pm I have to take an EtG test. I'm worried about passing, I have drank a lot of water today but not enough to cause a dilluted sample. The cut off is 250ng/ml. What are the chances of myself passing?