You are showing the classic signs that I’m seeing over and over in my classroom and school.
The swine seems to start with a headache as the first symptom, then body aches, then a variety of coughs, fevers, sniffles, sore throats - any or all of those.
But the headache is coming to be known (at least in our school) as step one
Had exactly all of that starting about two weeks ago. The lower backache and leg aches about a day before coming down with the cough/fever, etc. was quite pronounced. I'm just now getting normal.
I didn't have any nausea or stomach issues - just reduced appetite.