STD likely transmitted through which sexual encounter?

[ugh_whyme]

I'm un-insured so I just went to a local PP yesterday because I thought I had a UTI.  

Needless to say the Dr. told me that it looked like I had good bacteria, a little bit if yeast and a little bit of bad bacteria....  looking in the forums today for info and my rx for a one-time 1000 mg dose of Zithro, I'm thinking her best clinical assumption is that I have Chlamydia.  (Waiting for the labs on Chalmydia and Gonorreah that will come back in a week)  My symptoms definitely match the description of Chlamydia not Gonorreah, I have no color to my discharge and no foul odor.  

So mad that I'm having to deal with this and wonder where it came from, feeling dumb for trusting anyone right now.  Here's the issue and my main question.  These are the two sexual encounters I've had in the past month, which one did I most likely contract Chlamydia from?  

1.  5 weeks, 3 days ago:  let the guy I'd been dating perform oral sex on me.  He tried to have sex with me, started to penetrate & I pushed him back off of me pretty quickly.

2.  3 weeks ago:  after breaking it off with #1, got drunk and called my ex-hubby for a booty call while I was drunk.  We had full blown sex, oral and vaginally.  

I felt sore the morning after encounter #2, but that's fairly normal when I've been with him.  It wasn't until about 2 weeks ago that I started having some discomfort that I thought was just another yeast infection.  I am just not expecting an honest answer from either of these people and would like to know where this likely came from.  The ex-husband claims he's not had sex with anyone else, but now I'm doubting his integrity and honesty.  

Help please?    
  

[ugh_whyme]

Thank you for your response in regard to my situation.  I was thinking that transmission from situation #1 was not very likely.  I'm waiting on my tests and hoping this is something simple and not actually an STD that can be cleared up easily.  

Thanks again.

[Vance2335]

I can't say if you have chlymida, but I can say that most women will have no symptoms. So I am leaning towards you not having it but the tests will tell corretly if you do or don't.

Now you can not get chlymida from oral sex and the chance of getting it from that quick penitration is really zero.

If you do have chlymida tell ex to see a Dr from testing because it would have come from him.