Should I be worried that I could get pregnant?

Diamond
Hi, This will be my 4th month on the pill (I'm on the first week). And my boyfriend came in my today, my period ended on the 6th and my next period isn't due until 16 days from now. 
I take the pilll religiously and never have missed a day, do I have a chance of getting pregnant. I know this question is asked a lot but I would love to hear some feedback! 
Thank you so much in advance ladies :)