New pill

So I am on a new pill called Estarylla and I have been taking it for a month. I have been taking birth control for over 2 years but just recently switched pills to Estarylla. I usually get my period for 4 days but on this pill I had it for 7. I had sex on 4/18 2 days after I finished my period. He pulled out before he came but some might have gotten in me. I take my pill at the same time everyday. Should I be worried about pregnancy?