Thanks for your concerns. Given the acute respiratory infection requiring antibiotics, by far the most common cause of that nodule would be an enlarged lymph node
related to the infection; nevertheless, it should be monitored for resolution; most of them take about 4 to 6 weeks after infection has been erradicated to return to normal size; if it does not by then, it would warrant further investigation.
Dr Brenes-Salazar MD
Mayo Clinic MN