Bleeding During Ovulation?!

Summer

On the last day of my ovulation I started bleeding lightly even resembled spotting so I was getting excited. But after a day it became more like a medium period and lasted for another two almost three days. I'm confused and don't understand what happened, my period is in 4 days and I've had no pre-period symptom like normal? Can anyone help me understand what happened or what is happening? Please.