Is Pregnancy Possible Through Protected Sexual Intercourse?

I had intercourse with my boyfirend.we used condom.nd i ate a papaya too but i want to be 100% sure of avoiding pregnancy.aftr sex we also checked the condom it didnt rip off.nd he didnt ejaculate inside me.r there chances of me getting pregnant..how can i avoid it now and be safe beforehand .plz plz help..!!