This sounds like an upper respiratory in
fection that could in
volve your nose, throat
/or your larynx. It could be from a virus, of a type that can also cause flu-like symptoms. If caused by a virus, symptoms may worsen and
improve, but should defin
itely start to resolve at this, the ten day mark. More worrisome is that it could be a 'strep throat
' or, as you suggest, also in
volve your lungs.