I have that too, shyt went away for most of the day when I was active, but when I relax I feel it.Headache
Stuffed nose
Shortness of breath/lungs feeling congested
Try to cough something out but nothing comes out
i got allergies so my first guess was that but I took some medication for that and it didnt help
I will get checked out if it worsen. shyt his people different, some folks that had it didn't know and ended up fighting it off with mild to little symptoms