I am a 24 year old female and used to be able to drink alcohol without any problems, wouldn't even get a hangover.  The past two times I've drank (nothing too crazy) I am fine that night and the next morning then toward the evening following the night of drinking I start to feel nauseous. I go to bed and wake up around 1 or 2 in the morning shaking, hyperventilating, vomiting, have diarrhea, freezing but sweating and end up having a panic attack.  I have been doing some searching online about alcohol allergies and alcohol intolerance but haven't found much about symptoms occurring 36 hours later.  Does anyone know what could be going on?