Got sleepy and nauseated after drinking instant three-in-one coffee (the one complete with sugar and cream.)is this food poisoning?food contamination?

Sleepy. : Usually not poisoning. Large amount liquid drinking, especially hot liquid with high protein and sugar inside, might trigger your gastric congestion, more blood mobilized to digest and absorb the liquid or food. That might induce your brain relatively decrease blood supplement and cause you sleepy. No need worry, in most cases that is normal