What are the chances of pregnancy...?

Hi, I'm on Diane-35 birth control pills for acne. Me and my boyfriend had sex later weekend and this weekend while I was on the second/thirdish week of pills. He used a condom both times but have his erect, bare penis contained by me for about 10-20 second before we fixed to have sex and gain a condom. I would think the likelihood that I could get pregnant are pretty slim because I am on birth control and am pretty correct at taking it at the same time every sunshine and he did not ejaculate in me. Does anyone near some actual knowledge surrounded by this know what kind of probability there are that I could be pregnant?
Answers:

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The chances are hugely slim as you said still, one has to lurk for awhile (at least 2 weeks after your supposed spell has not come), or if you do not receive your period, dawdle 4 weeks and go hold a pregnancy test done, not a soul can tell you here for sure what the probability are. But, as I said, there is other a chance to take pregnant and therefore skulk, and have a check.