Dear Doctor,

Welcome to the Forum.  Thanks for your questions and your implied confidence in our service.  The exposures you describe was relatively low risk for STIs.  The doxycycline you took may have had several effects including virtually eliminating any risk for syphilis or chlamydia and reducing your risk for gonorrhea.  It may also have predisposed you to fungal balanitis.  Receipt of masturbation is a no risk activity and receipt or oral sex as well as condom protected vaginal sex are low risk for most STIs and virtually no risk for HIV as long as the condom was worn throughout the exposure and, like yours, did not break.  It is unlikely that you have any STI from these exposures but testing is reasonable.  When you are able to test, I would suggest blood tests for HIV and syphilis as well as a urine test for gonorrhea and chlamydia.  If the balanitis is still present it should be examined by a trained clinician.  As I've already said, the risk that you are infected is low but it sounds like testing is reasonable and will provide reassuring results.   I anticipate that the tests, all of which will be conclusive at this time, will show that you were not infected.---