should i get a plan B NEED ADVICE

i had sex yesterday & today unprotected but he didn’t cum & didn’t even get close (i’m positive of this). i’m on the very end of my period but taking my pills too (not the sugar pills, the real pills) were very safe about it and he didn’t even cum so should i get a plan B or think i’m pretty safe? this is most likely the only sex i’ll be having til next month. (please don’t say anything in the comments to freak me out, i’m aware i should’ve been safer. please just make me feel better, need advice) (i’m on a low dose of birth control & tomorrows the last day i could get a plan b)