Nausea & vomiting a week after Brazilian Butt Lift, is this normal ?

I didn't feel nautious at all immediately after the procedure & didn't even have to take my nausea medication but now almost a week after the procedure I began to feel nautious & lost my appetite I was easing back into meals & seemed to be doing fine but now just the look of food makes me want to throw up is this normal or should I go to the emergency room ?