If i was your doctor i would recommend u to start oral antibiotics
and advise you to wash your piercing area with pyodine or dettol
twice daily and apply some topical antibiotic
cream or gel on it after drying it completely. As far as the gold stud is concerned, u can wear it after the puss and blood stop coming out from your piercing area. Till then keep it clean, dont touch the area again n again and dont miss your antibiotic.