Chlamydia Misdiagnosis???

I went in for my yearly pap test. I complained of having trouble concieving and spotting exactly a week before my period leading into my period for 4 months now. I had various blood and swab tests and they said I have chlamydia. I was tested a year ago for chlamydia because I was pregnant and it was negative. I have never had any std and my husband and I have been married for 3 years with both of us having no extra-marital affairs--he also tested negative before we were married. I am wondering if this is something I could have given him before he was tested and then he just gave it back to me recently or could this be a false-positive?? Thanks--I am so concerned!