STDs and pregnancy

[jhpgfm]

I'm on a business trip and just ended up having sex with a woman in Brazil. I am married and my wife is 6 months pregnant. The girl was a regular girl i met in a bar and she insisted on using a condom. During vaginal sex the condom broke. My first thought was 'are you pregnant?' since I had just come. She said no since she was just starting her period, although there was no major blood flow. We also showered right after. Later, we continued with some oral (her on me) sex and she was again insistent on no intercourse until we got more condoms (that was the last one).
So, the morning after, and I am freaking out. What are the chances that I contracted an STD? I assume they are low as she was very insistent on safe sex and must normally be with others. If I got an STD, there are risks of passing it onto my wife and if so, I can see that in some cases, there may be a risk to the baby.
I do not want to tell her as this will (almost certainly) end the marriage. But I do not want to risk her health or the baby's due to my moral bankruptcy.  
I am considering faking having another illness in order to avoid sex so that several months will pass, I can have the STD screening after a dormancy period, the baby will be born and I can be treated...all without risk to or knowledge by anyone. This may sound like madness, but is actually something I have done before with success.
I am prone to cold sores and am considering saying I have an outbreak on herpes type 1 on my penis. Hence, no sex possible until baby is born (to be on the safe side). Then, it will magically never return and I will say I am one of the lucky ones who get a once off outbreak.

Considering all the information, is this utter lunacy, or a stoke of genius (though admittedly tainted by absurd levels of deceptiveness)?

I also have an ear infection today and I have started taking Azitromycine, which would possibly treat some STDs too, I gather.

[JessyJames2010]

We are here to offer medical guidance, not to make you feel better or worse about what you plans to decieve.  You should consider counciling, and I say this not to critizie you (because not even I am in a posistion to do that), but becaue we really want to help you.   From what you write and the way your write it, it appears like you have no STD concern but an ethical one.  

Re-read what Vance2335 said in their last paragraph about committment etc.

Best of luck,

[Vance2335]

If your wife does any research she will find out that if you have oral HSV 1 then to get it in the gentials you would have had to pick it up from someone else.

Telling your wife is 100% up to you and whatever lies you want to tell is up to you I will give you medical advice.

Your risk was probably low based on the fact that the woman wanted you to wear a condom. But here are testing times:
Gonorrhea and Chlamydia-1 week
Syphilis-6 weeks
HIV-3 months
Herpes-3-4 months but since you will be positive for 1 only need screening for 2.

I would also ask you maybe it is time to examine your life and committment to your wife, espically with a baby on the way since you said you have faked an illness before. Everyone makes mistakes and often learn from those mistakes but it seems like this might be an on going thing of cheating. I can't tell you to stop because it is up to you to do what you want but sooner or later people who cheat will get caught, so it would be better to stop now then get caught later.