Pregnant from pre c**?? Please help

What are the odds? Me and my husband had sex and he went in for a few seconds. He never finished and I finished him off later. He hadn't ejagulated that day, and I know that for a fact;) lol.
​I was on the 11th day of my cycle and I have generally a 26 or 27 day cycle (if that helps.)
​We are both not ready for a child at this point and are not financially stable enough at this point either. 
​What are the odds of us having a child? I mean I know there's ALWAYS a chance, unless you remain abstinate, but please help me with this. I don't start my period until the 17th of this month so it's too early to test.    

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