Chlamydia from oral only?

My girlfriend of 17 years tested positive for chlamydia. She has tested 2 years before and negative. I have never had unprotected or protected intercourse with anyone other than her, I have only given and received oral from another woman for the course of a year  My question is how possible is it that I got Chlamydia from oral sex then gave it to my gf and she tested positive for vaginal chlamydia? I am trying to understand the possibilities of this. Thank you in advance for your help.

[Nadyaa]

When you performed oral on other woman you might get oral chlemydia. Oral chlamydia rare, but this is still could happen.
So yes you may gave your gf clhamydia if you was performing oral on her.

[defjunx]

like freakout said however your chances are alot bigger if both of you have performed oral on eachother for a year infact i'm pretty positive you got it if you get oral from an affected person over a period of like 100 times or whatever