Linked Smoke Alarms Help Im Coughing Up This White Mucus Stuff, What Is It?

Help Im coughing up this white mucus stuff, what is it? - linked smoke alarms

I happened to get this cold in the mucus you cough a lot.
Sometimes they will last a month and I spit what I find an alarming number. I went to the doc on my boat and he gave me Sudafed.
But I feel like I could be nothing other than his crud.
I'm 25, I smoked for 5 years, the cough was bad enough, very easy to stop smoking this year.
So when I wake up, sometimes I can hardly breathe at all, until the cough these things for about half an hour. Yes, very seriously.
I am sure that due to smoking, but try to more opinions, what you could be here. Thank you.