Grade: 0
Possible sinus infection, manifested by persistent headache on left side (from jaw to temple), sticky congested feeling, and swollen lymph nodes on left side.
I didn't take any antibiotics, but I did do 3-4 saline nasal/sinus flushes (neti-pot-style but using a 1 L tonic water bottle). The headachiness and other symptoms went away by themselves. The runny nose (mostly clear mucus) is still present as of Aug. 9.