Hello, your situation is still to consider the inflammation of the throat and trachea caused by colds, when the daytime and activities, phlegm is easy to cough up, when sleeping phlegm elimination is worse, stimulate the trachea, so the feeling is heavier.

Suggestions:

It is recommended that you actively treat colds and flu, give effective antibiotics and antiviral medication, with intraoral medication, Guilin watermelon cream spray, throat wind dispersal, and so on, drink plenty of water and observe the treatment.