you are suffering from upper respiratory tract
infection.normally cold is due to a viral infection and subsides within 3-4 days but sometimes secondary bacterial infection sets in and course of disease gets prolonged and severe.
A course of antibiotics,and bronchodilator
syrups will help in releiving cough.Once the coughing subsides your muscle cramps
will go away fast.My advice is to visit an ENT specialist
and get yourself examined for fast relief.Hope this will help you!