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You should always tell the doctor if you are at risk or otherwise concerned about STD. Not knowing that, it sounds like your doctor did standard tests for urinary tract infection (UTI), which doesn't necessarily include STD testing. Ideally, all doctors would routinely include STD testing in this situation, but many do not. You should ask the doctor whether the tests included gonorrhea and chlamydia, but my guess is they didn't. Also, evaluating for NGU requires close physical exam of the penis, looking for discharge and inflammation.
Based on your exposure and symptoms, you probably had no STD, and if you did, Biaxin would usually clear chlamydia, NGU, and maybe gonorrhea. To be 100% certain, if not tested for these before you were treated, you should be tested a couple of weeks after you finish the Biaxin.
Is there anyone that can help me with this?
Any feed back would help thanks :)