Rectal chlamydia, 7 days on doxycyline

I was diagnosed with rectal chlamydia 10 days ago, had moderate symptoms (itch, discharge). symptoms went away after 3-4 days on doxy. Now, 2 days post-treatment, symptoms are coming back (milder than before treatment, but definitely there). I completed the whole course of abs, abstained from sex. What should I do?