Trying to rationalize drinking when she suspected she was pregnant
No amount of alcohol is guaranteed as safe even in early pregnancy. She admits here exactly what people are calling her out for. She suspected she was pregnant (she's been pregnancy baiting for weeks/months) but waited until Tuesday after her trip to test for sure. She didn't want to be "sad" on her trip if it was negative.
Then what does drinking have to do with that? She could have been responsible and not drank. Plus she showed herself vaping, got a tattoo, and drinking energy drinks all weekend.
She should just be honest about her putting her happiness first over being a responsible adult.