Do you stop breathing during a sneeze?

The answer is: no

Sneezing is a sudden and involuntary expulsion of air from the lungs through the nose and mouth. It is usually caused by an irritation of the nasal passages, such as from dust, pollen, or a cold virus. When you sneeze, the diaphragm contracts and the vocal cords close, which forces air out of the lungs. This air passes through the nose and mouth, creating the characteristic sneezing sound. While sneezing, you do not stop breathing, but the airflow is momentarily interrupted.