Hi Richard. It just has to run it's course. Lets face it there is no cure for the common cold. However vitamin C is good at helping to speed up recovery and help restore immune system. Paracetamol is good at reducing teperature and helping with headaches. Decongestant tabs or spray will help unblock nose and clear throat. A salt water gargle will also help clean throat and relieve inflamation, it is a mild antiseptic. Honey and lemon juice mixed together helps stop a tickly cough.
Hope you get well soon.