Hi.. Thanks for the query.. As per your complain it seems that you are suffering from upper respiratory tract infection, also known as Common Cold and the symptoms of sore throat, nasal congestion and runny nose are all due to cold.. As it is a viral infection it will not resolve with antibiotics which you are taking like Doxycycline and Rocephin as the antibiotics acts against bacteria and not viruses.. The infection will however resolve once the virus will complete its cycle in human body.. As of now you can start with supportive treatment to relieve the symptoms like: 1. Gargle with a warm saline solution that is by mixing 1 teaspoon salt in a glass of water and warm it to make a luke warm solution.. 2. Take a combination of decongestant like Phenylephrine, mucolytic like Ambroxol and anti allergic levocetrizine and another combination of Acetaminophen and Ibuprofen.. 3. Do steam inhalations.. 4. Avoid spicy and chilled foods.. 5. Sip on warm water throughout the day.. Hopefully the symptoms will resolve within a week and if it worsen consult a General Physician and get evaluated.. Hope this helps.. Thanks and regards.