It is extraordinarily unlikely that you would get HIV from such brief penetration, if it happened at all. If you want to test, take a 4th or 5th generation test at 28 days, but the risk is so astronomically low that I wouldn't bother if it were me.
You have been advised that your risk was extremely low, even if there was some penetration. There is nothing further for our members to say about this event.
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