After my 4th day of ovulation i had my period

Hello! Mommies & ladies out there reading this confession. So first i would like to ask something if anyone of you knows if its normal or not? Or anyone experienced the same thing to me? I had my ovulation my husband and i had sex during my ovulation day*withdrawal method (after that day i took a Emergency pill) days comes i had a brown discharge & a small amount of blood *no smell at all * as i noticed the past days my stomach got little cramps and a small feeling of having a little bit dysmenorrhea(?) but anyways after my ovulation during 5th day. I just had a blood under my undies and its flowing the color was pure red. At first there was no smell until ut becomes more flowy and now I'm confused it this is normal? Thank you so much for those who can answer my thoughts. xoxo