Help😅

Good afternoon my gorgeous lady's, wanted to see if any girl can help! How big the possibility of getting pregnant on a low fertility day can be posible?

My boyfriend and I been having sex 3 consecutive days and several times a day (we normally use condom), which only 2 times of this sexual encounters we did not nd he finished inside. We aint looking foward to have family YET and everthing started to happend jst a day after my period ended nd like the 4th day, and gyddimg from my fertility calendar its a "LOW FERTILITY DAY". Any recomendation if i should take the next day pill 🤔? Might sound dumb but it dont really happens aften, sorry and thanx for the help🙏