Bleeding after ovulation

i quit taking my birth control LAST month... so I've already had a normal period since then. I had sex the 7th and the 14th day since the day I started my period. Two days later, I'm bleeding. why?

Probably "breakthrough bleeding." It often happens when contraceptive methods are changed or terminated. Read the article at the link below:

http://en.wikipedia.org/wiki/Breakthrough_bleeding