Used to get a flu strain every year as a child. Those always seemed to be stomach bugs that made you vomit
That wasn't the flu, it was a stomach bug of some kind; norovirus, salmonella, etc. Influenza is a respiratory disease. The only time flu makes you puke is when you cough so hard and uncontrollably that the coughing triggers the vomiting. If you don't have a deep, wet cough with a fever and chills, you don't have the flu.