You were stupid to put yourself at risk and to retest at 13 weeks and use condoms and plenty of water base lube.
There is a big difference between a unprotected receptive anal sex risk and oral sex, risk wise.
Oral sex is so very low risk that you are fine testing earlier. If the exposure was unprotected anal, a person would want to test to 12/13 weeks.
Dr. H has explained why with higher risk exposures need to test out longer MANY times on his forum. If you search, you'll find the explaination. Its even been posted here on this forum.
arent I a smarty? but teak wont answer me now, he still just thinks Im the silly blowjob girl. :(
i love that analogy. Im gonna try and ask a question to the doctor tomorrow and ill ask about what are the chances that a 9 week negative changing regardless of the risk.