But ....

I had sex on the 18th, and ovulated last week and I'm not expecting my period until the 9th of December. Now here are the facts, I had protected sex while having sex and he pulled out even though he was wearing a condom, at one time he was not wearing a condom and that could be the one time he came in me, prayerfully not because I can not handle a child in my life right now. I had sex two days before my ovulation days. What do you think? Could I be pregnant or no?