plan b?

so i had sex with my s/o last night & the condom broke again... he pulled out right away but i'm still worried. he haden't cum or anything but i'm just wondering if i should take an emergency contraceptive pill. i've taken 2 so far a while ago in summer. we want kids just not right this second. does it effect you being able to have kids down the road? & it's two days until my fertile window closes. please help