This has happened atleast five or six times now. The first time was a few months ago, when i drink this can vary from two glasses of wine to a heavy night out, then go to sleep that noght feeling fine then in the night i will wake up and feel the need to use the loo but each time i have felt extremely faint and nausious and my knees have buckeled causing me to fall to the ground and my body has tried to throw up. Each time i feel heavy like i cant get back up. It happens most times when i have even a glass of wine now. Im 18 and never had a problem with drinking before. Im around 5"10 maybe...average. and a healthy buildabout 10 stone. No bad family health problems. Thanks.