I had sex (ejaculation occurred) on 7/3 around 3.00am and took the Plan B around 5.30pm that same day. According to my tracker My ovulation day was on 6/25. I have symptoms of my period on and off except I'm just having extra bad lower back pain. My period is supposed to be starting on 7/10. Would the pill have even worked or done anything if I already ovulated?