Sex day after period ends?

I have been on birth control for 3 years now. I take Estraylla. I take the pills everyday consistently sometimes an hour or 2 later than usual. I had sex on Jan. 26 which is the day after my period ended. I take 7 sugar pills in the last week of the pack. The day I had sex I took the 1st hormone pill of a new pack. He pulled out but did not wear a condom. Do I need to be worried about being pregnant? I have sore breasts & feeling bloated. I am not due for my period for another 3 weeks.