Hi Daz, A negative result using the BioSURE HIV Self Test is conclusive from 12 weeks (84 days). So as long as your last possible exposure was over 12 weeks ago, your negative result is reliable and conclusive which means you do not need to retest. Of course, if it would help to put your mind at rest you are welcome to also get a test done at a clinic but it is not necessary and sometimes testing further can only prolong your stress and anxiety. I would try to accept your result and try to move on from this. If you were to have been infected 3 months ago, antibodies would be present in your blood and the test would have been able to detect infection. I hope this helps to put your mind at rest. Kindest regards, Becky