I've been dealing with this uncontrollable cough and this thick, frothy sputum for almost four weeks now and it's not getting better. It's really hard to breathe with the coughing being non-stop. I'm starting to get worried. What could be causing this, and what should I do?

This could be a sign of a respiratory infection or condition such as pneumonia or bronchitis. I recommend you take an over-the-counter cough suppressant like Delsym (dextromethorphan) as directed on the package. Additionally, you can use an expectorant like Mucinex (guaifenesin) to help loosen the mucus. It is important to stay hydrated and get plenty of rest. If your symptoms persist or worsen, please seek medical attention promptly.