Since your fever and sore throat are not improving with Augmentin and paracetamol, and you are now experiencing chest pressure, coughing, and back pain, it is very important to be evaluated by a healthcare professional right away. Please visit an urgent care or emergency room today so a doctor can listen to your lungs and check your heart. This helps ensure you receive the correct treatment. Please rest, stay hydrated, and seek care promptly.

It is common for throat pain to return if the underlying infection was not fully cleared, as a four-day course of amoxicillin-clavulanate is often shorter than the standard duration required for bacterial throat infections. It could also indicate a viral infection. Please do not restart any antibiotics, pantoprazole, or montelukast-levocetirizine without a doctor's guidance. I highly recommend consulting your healthcare provider for a throat examination to determine the exact cause and get the correct prescription. For temporary relief, you can gargle with warm salt water, drink warm fluids, and rest. This is a very common issue and easily manageable with the right evaluation.