when i went for my 12 week HIV DUO test i did not see them unpack a new syringe so i thought that the syringe has been reused, however the hospital reassured me that they don t re use any thing, because of the uncertainty i waited 4 weeks and then i had my HIV DUo test today and it was negative so can i consider myself conclusive or do i have to test at 12 weeks again?????????