I would say that the only way to know for sure that you do not have chlamydia is for you to undergo a second test, so it is important to visit your primary care physician
. I am not entirely sure that the first test, the day after you had sex, can be relied upon. I do think that most likely if you are exposed to chlamydia test may come back positive, but this depends on the type of test that was ordered. The second issue, which is the antibiotics that you took already, I think should not be relied upon as a sign that you are cured. Amoxicillin is not in an antibiotic that we typically used to treat chlamydia. Chlamydia does not have the same kind of machinery that amoxicillin would necessarily attack. The antibiotics that we typically use for chlamydia include azithromycin and doxycycline. Keep in mind that if you are going to be tested for chlamydia, you should also be tested for gonorrhea. These two bacteria like to travel together, and the symptoms cannot be distinguished without laboratory tests. Both of these can be treated with a single dose of antibiotics. Gonorrhea can be treated with a single shot of ceftriaxone whereas chlamydia can be treated with a single dose of azithromycin. Good luck.