It sounds uncomfortable to have a dry cough and chest pain for a week despite using Betadine gargle, Doxcef (an antibiotic), and Ascoril Plus Expectorant. Since your symptoms have persisted and the expectorant hasn't helped, it’s important to have a thorough evaluation to rule out infections or other causes needing different treatment.

• See a pulmonologist (lung specialist) or a general physician promptly for a detailed examination and possibly a chest X-ray or other tests.
• Continue your current medications only as prescribed; do not add or stop any without medical advice.
• Monitor for worsening symptoms such as difficulty breathing, high fever, or severe chest pain, which require urgent care.
• Avoid irritants like smoke or strong fumes and rest adequately.
• Stay hydrated and avoid self-medicating beyond what your doctor has recommended.

If symptoms worsen or you develop new signs like shortness of breath or fever, seek emergency care immediately by calling Apollo Emergency at 1066. Consulting a specialist will help identify the cause and guide appropriate treatment. If you want, I can explain more about possible causes or treatments.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand that you have had a dry cough and chest pain for the past week and that you have tried some medications without relief. I will do my best to help you.