Your symptoms suggest a mild viral upper respiratory infection with sinus congestion, which usually improves in a few days with supportive care. Since you want to avoid drowsiness, you can take non-sedating options like steam inhalation 2-3 times daily, saline nasal sprays to clear blockage, and paracetamol for fever or discomfort; a non-drowsy antihistamine (like levocetirizine/fexofenadine) can help with a runny nose if needed. Drink plenty of warm fluids, avoid cold exposure, and try a gentle warm compress over the sinuses to relieve pressure; chewing or yawning may help relieve the blocked ear. Antibiotics are usually not needed at this stage unless symptoms worsen or persist beyond 5-7 days. If you develop a high fever, severe headache, facial pain, thick yellow/green mucus, or worsening ear pain, consult a doctor for further treatment.