not sure if i can help you here puppies. i am still learning myself. But i didnt know that cramping was a sign of implantation. I mean we are talking about a cell structure the size of a pin head. Even implantation bleeds are only generally a couple of spots of blood, if at all. i know some women swear that they know the exact moment it happens but in my own experience of early pregancy (4 times) there were no physical indications of pregnancy at all until i got to around 6 weeks and felt ill. Sorry probably not much help to you.