I understand your concern. I am Dr. Arun Tank, infectious disease specialist, answering your concern.
You are HIV
HIV DNA PCR is gold standard test for diagnosing any infections.
For HIV PCR test conducted after a week from the exposure is considered as a final result. As you tested yourself after a 16 days you can disclose yourself as a HIV negative person.
There is no need to worry for you. You can delete the contact exposure of yourself and forget the incidence that such things happened with you.
Glad to answer your further concern contact me on bit.ly/DrArun
We wish you a best health at healthcare magic.
Dr. Arun Tank
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