Andrew said: 1. It could be! Very possibly that would be a good diagnosis to use for the acute aspect (and maybe chronic too) of the disease. My question for you is: Can you look a bit deeper into the symptom picture to see what pattern is underlying? Phlegm-fluids obstructing could be the primary pattern. However, you might also be able to find an even deeper pattern for the chronic aspect of the disease.
2. I might think of spleen not controlling blood. It would explain several symptoms: Healthy diet lessens the burden on the spleen qi and allows it to recover, poor diet taxes the spleen. Poor sleep exhausts qi and blood (manufactured by spleen). Petechia= bleeding. Nausea and cough = qi counterflow; nausea because spleen-stomach ascending-descending relationship impaired, cough because earth must nourish metal on the generation cycle. Muscles belong to the spleen. The anxiety, dry nature of the cough, and symptoms worse at night may be related to damaged yin. Having COVID, especially if there was a fever, can damage yin and fluids.