I do sometimes get a little scared about passing. There are times when I am really short of breathe and cannot seem to get air in my lungs. I have been exercising by breathing thru the nose slowly and then breathing out the mouth. I have a lot of mucus as you do. Usually early morning I experience that. All I can do is Cough it up. There is mucinex that you can take to reduce the mucus. I do use that when it gets really bad. I do get a little scared but when the end comes and I am in hospice my doctor said he would not let me suffer, and I am relying on Jesus to see me thru. Hope you are in a lower stage then i am. I am on oxygen 24/7. But I am still driving and go to the store and shop for groceries. You have to keep pushing forward and not give up. My theory is FIGHT as long as you can. I do believe God will be with you thru to the end. I really feel it will be peaceful. Just keep your faith and I will say a prayer for you to get peace until God takes either of us. God bless and keep you