21 Days after quitting smoking, i am a 32 year old male, i smoked for about 16 years. I get nausus and try to throw up, but i just hack up mucus. Normal? How can i make the mucus easier to come up and how long will this last? I feel really weak and fatigued. Normal? When i hack up the stuff, its just got a little bits of brownish color, the most of it is clear or white. normal?