Hello,
Sometimes severe coughing can lead to vomiting. There are many
causes of nausea. Stress, medications,
reflux disease, gastritis, hepatitis, migraine; CNS causes are few conditions presenting wit nausea and headache. The presence of associated symptoms and clinical examination findings may be important for correct diagnosis and treatment. It is possible that GERD is causing acid and food to reflux back. You will need antacids and medications for your cough. Take light food.