Hello dear, Thanks for being on healthcaremagic.com. I will summarise your clinical syndrome as-Headache with sensitivity to loud noises,difficulty in concentrating,irritability,nausea with cough and congestion.The most likely possibilities are- 1)Tension type headache(TTH)- Except cough and congestion,your clinical symptoms well fit into the diagnosis of TTH. It can result in irritability,headache and inability to concentrate. 2)Viral infection related fatigue syndrome-cough,congestion,headache,irritability and lack in concentrating are all typical features of viral infection related fatigue. Please take adequate rest,maintain optimum hydration,good sleep and food.Mild analgesic and cough syrup can be taken(under a physician s guidance).You will improve soon. I hope this reply helps.