Re: implantation bleeding or period?
I believe implantation usually happens between 7-10 days past ovulation, so if you ovulated on day 14, probably not. But if you ovulated later for some reason, then it could be. Lots of women seem to have spotting around the time their period is due when they are pregnant--don't think it would be called implantation spotting, but I'm not sure what it's called.
This probably doesn't help much...but if you still haven't started, it might be late enough for you to take a pregnancy test. Good luck!