How much of a chance is there that I'm pregnant??? Please help...?

I've been on Yasmin (higher dosage of Yaz) for about two and a half months now. I was on it before, but I got my refills a month late so I had to start again. On sunday my boyfriend and I had (stupidly without a condom) because we felt safe enough with just the birth control. However, I did some research when I got home and found out that since I don't take my birth control pill at the EXACT same time every day (sometimes it's a few hours later, or even later that night) it reduced the effectiveness to 80%. Now...I researched Yasmin some more and some updated info said that if I forgot to take my pill at the same time...I would still be protected from becoming pregnant for a day. Also, I took the morning after pill Norlevo on Tuesday, so within 48 hours of having . I'm still really worried though, and I was wondering if anyone had any idea how much of a chance there could be that I'm still pregnant? We had the first day of the third week of my birth control pack....(exactly one week before the placebo pills).