my last period was on dec 7 2008 and i am pretty irregular, by the 12th of jan 09 i took a pregnany test and it came out neg, on the 22nd i still had no period, finally on the 27th i had cramps but very light bleeding at first it was like spotting, but its not like a regular period its lighter color and small amount is different from what my usual period looks like.. as in heavy bleeding and such, i am experiancing bad cramps and the bleeding is still light, usually after a couple of hours my tampon is usually full, this feels different as in its unusually light, is there any way of definitively telling wether or not just by how it looks or if there is any severe cases of cramps reported with implantation bleeding????