Some advice

I’ve been on birth control for the past almost 2 months and been taking it consistently. I’m 17 years old btw. The day before I took my before my sugar pill to triggers my period my boyfriend finished inside of me. Out of concern a day later since my period didn’t come, he sent me money for plan B. I took the pill because I was paranoid that the birth control pill wouldn’t work. But my period still is late. Idk if I’m pregnant or not. I don’t think I am but i really would like some adult help. Please help!