Hello
You are having some sort of VIRUS ( according to you and query ) and also there were body aches ,
fever .
These symptoms remained almost for 10 days .
Now you are having light-headedness and nausea.
In my opinion this is not due to any type of virus but these symptoms may be due to these reasons, these include.
1 Hyper acidity or
gastritis caused by fever or the drugs taken for body aches and fever . These drugs produces hyper acidity and this is main cause of NAUSEA & LIGHT-HEADEDNESS . Since these symptoms are troublesome, so take some
antacid syrup ( if it contains oxetacaine , better) but if there is
severe nausea then you may need drugs like
proton pump inhibitors like pantaloc- D once or twice in day . Also avoid greasy , oily , spicy foods . It might also help to avoid drinks containing caffeine in them ( like coffee or tea ) .
2 Tension or
anxiety may develops such symptoms caused by after effect of virus fever.
In my opinion this is not a cause of concern , rather try to divert your attention toward other things . These symptoms ( common after fever ) subsides within next 5-7 days . Good luck.