I'm took my antibiotics for chlamydia, and a couple days later, i start spotting again.

Get a re-check!: I recommend you return to your doctor for a "test of cure", to make sure your infection is all gone. Too, the antibiotics may have caused a secondary yeast infection. Take care.

Chlamydia: Get rechecked and check urine/blood pregnancy test. Additional microorganism in the female genital tract that can cause infection include GC, trichmonas, (a true pathogen), yeast, BV,mycoplasm/ureoplasma ( normal flora that can become pathogenic), even strep and anaerobes. Flagyl, doxycycline and Rocephin (ceftriaxone) are other medications used ot treat these various organism. Discuss with your doctor/urgent