Chlamydia

I was recently diagnosed with Chlamydia over the weekend I went for a std screen after my partner admitted he stepped out and where having some symptoms of an std. Got tested 7/30 and was told I had trichomonias a couple days after once the results came back. I went for a follow up on 8/26 and redid the swab and then it came back with Chlamydia. My question is is this common to get both back to back ?Secondly I was given a 2 tablets dose of azithromycin to take for a single does. How long does it take for symptoms to subside?