Your question was answered to the best of our member's ability.
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You didn't have a vacutainer incident. You had a blood draw. Afterwards, you had a generalized anxiety disorder incident.
I would say the same as others that if you have generalized anxiety disorder, the best thing to do is to seek treatment for that. A psychologist can help you with coping skills, a psychiatrist can help you with medication if necessary to get control of this. Constant worry and anxiety takes a toll and if this is interfering with life, it's time to make sure you get proper psychiatric care. That's the most important information we can share with you. Phobias aren't something you should continue to give into but work on eliminating.
What you describe is unlikely. You probably misheard and misinterpreted what the nurse said. The container 'could' be reused but they don't do that in practice.
What as your risk that made you decide to get an hiv test, and did you use a condom?