would it... could it..

if you take plan b the day you ovulate would it still be effective?? & if you took it at 17/21 hours? i’m spotting & bleeding on & off today. i noticed the brown stuff you get at the end of your period started coming yesterday at night & than today i woke up with cramps & i pooped, like period shits lol... & than i took ibuprofen (2) & the cramping went away! & now i have just been spotting (brown blood & red blood) on & off, all day... i took the pill the 11th & start ovulating on the 10th, i know you have higher peaks of ovulation because of the app, usually mine says the third day is my highest. which s usually 33% or higher, & when i ovulate i have either cloudy white discharge or the stringy clear kind for about 5 days... does this all sound normal? should i be fine?