Hi welcome to HCMForum. it appears to be lower respiratory tract
infection. it should be treated completely till the secretions are completely cleared. by home treatment appearent cure occurs , leaving behind the flegm. I advise you to consult a chest physician for diagnosis and treatment.
Besides i advise you to follow some diet recommendations. as take balanced diet containing green leafy vegetables, pulses. Dont take fruits juices, ice cream, ice water. dont worry you will be fine.