I’ve had a persistent tickle cough for a week now that’s worse at night. I’ve taken cold and flu tablets, cough syrup, hot drinks, throat lozenges, honey and lemon, drank loads of water but nothings working. The skin on my neck and chest is also hot and itchy (no visible rash). What is this and how can I cure it? I’ve been trying to sleep for 6 hours now and not managed even 6 seconds, help!