You and your doctor have seriously overreacted to a very low risk event. I would have advised against treatment with doxycycline or anything else. And when preventive treatment is used, the recommendation is a single 200 mg dose of doxycycline, which effectively prevents both syphilis and chlamydia. However, the risk of syphilis from such an event is exceedingly low (under one chance in thousands, although this depends in part on where you are, i.e. the background frequency of syphilis in partners like yours); chlamydia is very rarely transmitted by oral sex; and no dose of doxycycline reliably prevents gonorrhea. We never advise forum users to go against their own doctors' advice or treatment, but you might discuss stopping doxycycline with your doctor. You absolutely do not need to continue it; after a dose or two you were entirely protected against syphilis and chlamydia.

In absence of symptoms, I would not advise testing at all. But if you decide to do it, have a urine gonorrhea test a few days after your last dose of doxycycline. Almost certainly the result will be negative. You don't need testing for anything else.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD