Hello,
Based on the information provided, your son does not appear to be in a condition that requires urgent consultation. Most likely, he is unable to manage his nasal secretions and is swallowing them, causing him to vomit. It is important to continue to monitor his general condition (change in behavior, attitude and energy level) compared to his usual condition.
To complete my analysis, can you answer the following questions?
How often does your son vomit per day?
Does he vomit in a stream?
Does he show signs of moderate dehydration (lost skin elasticity, hasn't urinated for more than 6 hours, very dry mucous membranes, fatigue, irritability, increased or excessive thirst, sunken and darkened eyes...)?
Have you used any over-the-counter products to reduce the fever?
Does your son vomit in any other context?
Does your son usually regurgitate after meals?