Since you posted this in the VSG forum, I'm assuming that's the operation you just had.
Take heart! Many people have nausea and throw up after any major surgery, esp with general anesthesia, and or course having your stomach cut on doesn't help. I experienced this after my DS - different operation, but same anesthesia and same stomach portion. By the next day I felt a lot better. You will feel better day by day as well. Some people recover faster than others, but it's not a competition or a race. Just remember that this is for the long haul, and the temporary misery of recovery is worth it.