I have been coughing so much and so hard for severely weeks now my mucus is so thick it looks just like silicone but it’s a green color I drink a lot of water and Mucinex it helps some but not all the time it seems like it mainly flares up at night time I don’t know what else to do I’m so afraid I’m going to have a heart attack from coughing so hard my lung doctor want see me but every 6 months he really don’t seem to care can anyone give me some advice please ? My oxygen levels are good and doc said my breathing test was good it’s just the mucus is so thick I’m scared I’m damaging my lungs more for coughing so hard