Colds and coughs are typically caused by viruses, which is why antibiotics (which only target bacteria) did not provide relief. You should stop taking unprescribed antibiotics. Instead, focus on symptomatic relief: 1. For pain or fever: Take paracetamol or ibuprofen. 2. For cough: Use an over-the-counter cough suppressant (for dry cough) or expectorant (for wet cough). 3. For congestion: Try saline nasal sprays or oral decongestants. 4. General care: Stay well-hydrated with warm fluids and get plenty of rest. If your symptoms worsen, last more than 10 days, or you experience breathing difficulties, please consult a doctor for a proper evaluation.