A week ago I engaged in unprotected cunnilingus with a CSW in Shanghai. I am concerned as the gum beside my buck tooth bleeds when I brush vigorously. I plan to get a Duo test done, but due to my business schedule, I only have the chance to schedule one on 27th day of exposure. As DUO is mentioned by other experts to be conclusive at 4 weeks, I'm wondering if this 1 day difference would make a significant impact on the accuracy of the test result. I.e. if it is negative at 27th day, should that be conclusive to put my worries to rest?
Thanks so much.