After a viral respiratory infection, the residual coughing sometime persists for a period of time. However this new complaint of yours like aching all over and pain in chest could herald a fresh episode of a viral. I think you will benefit from some warm salt water gargles and some tylenol.
Suppose you do not improve with these in a couple of days' time I strongly suggest you consult your internist.
Dr Apurva C Madia
Consultant Cardiologist and physician