Should I take plan B?

Hailey
My boyfriend and I had unprotected sex the day after my period ended and he pulled out before he ejaculated. According to my app I'm not supposed to ovulate for another 8 days, but I typically ovulate a week before my period comes. If I was just going off of what my app says about when I'm supposed to ovulate, do you think I should get plan B? Or am I in the clear since it was right after my period?