Thanks for posting your query.
Possibility of HIV
through group ear piercing cannot be ruled out.
At the same time, HIV symptoms will never appear within two or three days of the event. early manifestations of HIV acute infection will take at least 2-4 weeks to appear. Anything prior to that period could not be due to HIV.
So your fever
, sore throat
, loss of weight all may be due to just because of cold
and your diet only and not due to HIV.
Anyway it is better to have a blood screening for HIV after three months in a good laboratory or a center.
Wish you all the best.