If you have been experiencing yellow/green secretions and coughing for almost 10 days, it is a good idea to consult a healthcare professional. These symptoms could indicate an infection that may require treatment. It is also important to stay hydrated and avoid cough suppressants as they may hinder your body's natural process of clearing out the secretions. Additionally, if your cough persists after 3 weeks, if you have a fever lasting more than 3 days or reaching a temperature of 40° Celsius, if you experience diarrhea or vomiting, it is recommended to see a doctor for further evaluation.