implantation bleeding or something else?

my last period was on 8-1-06,i ovulated on 8-12,on 8-22 i had some pink turned to brown very light spotting...not even enough to wear a pad or anything,then it went away the same day.then today on 8-23 i had a bowel movement,no straining or anything,but i had a little more vaginal spotting...im not due for a period until 9-1-06....could it have been implantation bleeding? or something else?

Unfortunately, because there is no way to test implantation, and because many docs call implant bleeding a myth, there is no actual way to know for sure...

It could be yes... About 5 days before a period, you can take a "first response early" pregnancy test, but unfortunately there is no way to know so soon..