Im normally a heavy wine drinker but now i get nausea from the taste after 4 glasses and cant get a buzz either. any possible reasons?

Alcohol: Heavy alcohol drinking of any type does not bode well regarding the imperceptible transition into true alcoholism. When that happens the quantity and frequency tend to take on a life of their own, regardless of annoying physical symptoms. Many people go on to serious physical and mental problems. I would take your body's hint and stop altogether. If you find that it is too difficult consider help