Hello, As per my clinical experience, the lump in throat with difficulty in breathing, headache do indicate respiratory tract infection with secondary systemic features. The palpitation does indicate underlying stress and anxiety rather than cardio issue and hence the EKG is negative. My guidelines at present: - Drink more liquids in terms of boiled water, lemon juice, coconut water, home made juices - Prefer easily digestible food stuffs to avoid acid reflux - Continue medications as antibiotics, proton pump inhibitors, anti-inflammatory prescribed by your doctor - Do discuss need of any anxiolytic medicine during your next scheduled visit to your doctor office - Manage to have sound regular sleep of 6 hours Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Bhagyesh V. Patel, General Surgeon