If you have been coughing a lot for the past two weeks and experiencing vomiting as a result, it is likely due to secretions draining from your nose to your throat, causing irritation and triggering a cough reflex. To address this issue, you may want to try using a Sinus Rinse™ treatment twice a day for 5 to 7 days to reduce the amount of secretions in your nose. Additionally, you can try other remedies such as elevating the head of your bed, taking honey lozenges, or using cough syrup. If your cough persists after a week or if you develop a fever, it would be best to seek medical advice.