Plan b

Haven't kept up with glow in a while since hubby and i are NOT TTC. BUT on mother's day we slipped and i didn't think much of it since a women is highly fertile for only 7 DAYS. But out of curiosity i went on glow and what do u know, it just happened to b MY MOST FERTILE DAY (according to glow) SUNDAY.... I got out of work to late on Monday but was able to make it out on time on Tuesday to catch the drug store open and take the plan b pill... 48 hrs later... do y'all think i could have become pregnant that exact second... i know sperm stays alive in u a bit after but hoping i caught it on time for plan b to kick in...