http://www.cdc.gov/globalaids/Resources/pmtct-care/docs/TM/Module_6TM.pdf
Page 11
#4
In an adult, a positive HIV antibody test result means that the person is infected, a person with a negative or inconclusive result may be in the “window for 4 to 6 weeks but occasionally up to 3 months after HIV exposure. Persons at high risk who initially test negative should be retested 3 months after exposure to confirm results
From the CDC website:
1. Less common modes of transmission include: Being “stuck” with an HIV-contaminated needle or other sharp object.
2. Most people will develop detectable antibodies that can be detected by the most commonly used tests in the United States within 2 to 8 weeks (the average is 25 days) of their infection. Ninety-seven percent (97%) of persons will develop detectable antibodies in the first 3 months. Even so, there is a small chance that some individuals will take longer to develop detectable antibodies. Therefore, a person should consider a follow-up test more than three months after their last potential exposure to HIV. In extremely rare cases, it can take up to 6 months to develop antibodies to HIV.
You never at a risk of contracting HIV.
Was this some type of ritual? Your writing is hard to follow. From what i understand you were 'stab' by a needle which was used to stick other people. I guess this was all voluntary, correct? Well, i would say that Yes there is some risk involve, not just for HIV, but maybe Hep C. I would go get tested at 3 Months (97% accurate) and at 6 Months (99% accurate).
Good luck!