How to treat an impulsive cough with green phlegm naturally?

Hi doctor,

I am a 24-year-old female who is 5 feet 3.5 inches. And I need help diagnosing my problem. I have been sick for one whole week, and I have taken cough medicine and a little bit of natural bronchial mucus expulsion medicine, which has not worked on me. I am currently having issues with an annoyingly random impulsive cough that makes me cough, mostly green phlegms, which are horrible to deal with. They make me feel so horrible that I want to gag or vomit the phlegms out. It also prevents me from enjoying eating food in a pleasant way because I always get the attack and sleep. Nights are the worst because just as I thought I was sleeping peacefully, I felt like my body had become possessed. I even hear myself saying "Mhm" like I am talking and agreeing to something, and then, suddenly, I get caught off from oxygen. I wake abruptly only to get up from bed and go to the bathroom to gag or cough out the big-medium-sized phlegms that can rarely be white or yellow but are mostly green. I had this problem persist for one whole week, and I drank lots of water but saw no improvement. I have not seen a doctor because my parents are hesitant and want to cure me naturally. I want to know the problem and the natural ways to cure it. I want to go back and sleep and eat well again. Please help.

I am currently taking SuperLysine immune support, Robitussin for cough and chest congestion DM, Magnesium spray, Blue star Medicated ointment, Emergen-C, hot honey with lemon drink, and tea.