Sore throat, dry cough and a sore chest?

im 15, and i have a sore throat, dry cough and a sore chest. The cough is defnetly getting worst, last night i cudnt sleep cause i had to keep coughing. Its hurts my chest when i cough.

what could this be?
Update: i have abit of flem in my throat aswel
Update 2: its harder for me to breathe, and when i do excercise i have to gasp for air!
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