Hi welcome to the health care magic You are suffering from acute respiratory tract infection condition.... Most of this infection caused by viruses like rhinovirus, influenza virus, adenovirus etc... Headache, muscle pain occurs because of constitutional symptom in such condition You have to take rest for early improvement You will not able to do activities in game with your full participation So better to take rest.. For Symptomatic relief decongestant antihistaminic drug can be prescribed like levocetrizine or phenylephrine Steam inhalation done three times a Salt water gargle done Drink more water to loose mucus and for soothing (warm water) If secretion accumulation more Ambroxol lozenges or syrup or tablet can be used Vitamin C lozenges taken three times a day Hope your concern solved If improvement not seen then CBC done and antibiotic started Take care