Ongoing mega soar throat, fever, night sweats, feel weak, dizzy, shortness of breath, headache, no appetite, dry cough now gone, bronchitis or sth els?

Seasonal flu: It is very common viral infection. Usually the condition resolves on its own with home care. Drink water and get a good rest. If there is no improvement or sore throat is severe or lasts longer than another week, or you are getting joint pain; see your pcp for evaluation.

Definitely: All those symptoms can be from bronchitis. You need to see your doctor to get checked.