help please :)

hi-so i ovulated on 17th, my fertile window was from the 9th through today (the 21st)- i don’t know why it was so long!! Period was due in 10 days.

I had protected sex last night- but there was some stuff that was on the outside of the condom. i’m pretty sure it was my own, since i already ovulated i know i can’t a plan B.

today i have been having really bad cramps and i started bleeding. do y’all have any idea why? and should i worry about pregnancy anymore since i’m bleeding now?

thank you!