so confused TMI

Alexis • Mom of a little girl ❤️ Aubree Elizabeth Dellinger was born 9/1/28
So my period started the 9th and ended on the 15th. I ovulated on the 23rd but that same day me and my SO were having sex and he came in me pulled out and I was bleeding. I am still bleeding. The flow is medium and it's reddish brown. What could this be? I'm freaking out!