Your risk for STD from the exposure you describe was very, very low to start with and now, with the testing and treatment you have had, you can be sure that your continuing problems are not due to an STD. Your genital sex was condom protected, pretty much guaranteeing that you did not get an STD from this exposure. Receipt of oral sex can lead to STD transmission, primarily non-gonococcal urethritis (NGU) and gonorrhea but the treatment you have had, ceftriaxone (the injection) and doxycycline is highly effective therapy for NGU and gonorrhea (chlamydia too for that matter).
If you had unprotected genital sex, I would worry that you might have trichomonas but this is not transmitted by oral sex. (the treatment of trich is metronidazole, 2.0 grams as a single dose.
At this juncture, prostatitis is a possibility. Prostatitis is not an STD and having it does not place your partner at risk. Diagnosis often involves a rectal examination to feel the prostate. It is treated with different medications (fluroquinolone antibiotics, like levofloxacin) which must be taken for longer periods of time (3-4 weeks).
Bottom line, believe the tests. You do not have chlamydia. Work with your doctor to address non-STD causes of your symptoms. Good luck. EWH
Trich can cause urethral (penile symptoms) although most men do not have them. As I said before, trich is not transmitted by oral sex. In addition, you have now been tested and the tests were negative. This is not trich. EWH
Thank you- I believe I had a urine test for trich which was negative. is is possible to have a false negative for that? what are the symptoms of trich? can it come and go?