So i have already ovulated and had sex the day before during and after now i am spotting a little blood. what is this?

Implantation?: How far out are you from ovulation?It's possible it could be implantation bleeding which occurs when the fertilized egg implants into the lining of the uterus and sometimes causes a bit of light bleeding.Since you had sex during all your fertile days,I would be concerned for a pregnancy if you weren't using any protection.You may want to consider testing if you are close to when you'd start period