I have got my belly button pierced last January and it's been a year now. About two weeks after I had it pierced, I had a fever with diarrhoea, vomiting, dry cough, blocked nose, muscle pains, joint pains, head ache, sore throat, sneezing, difficult sleeping, tiredness and lose of appetite. But, do note that I didn't have the body rash that's typical with a HIV primary infection so that could've been just a seasonal flu or my body fighting against the piercing.