For those with an irregular cycle or those who are simply not sure when their period is due, there is another key way of determining whether your bleeding is a period or an implantation bleeding. Menstrual bleeding tends to speed up soon after you first notice it. Unlike your period, an implantation bleeding literally consists of a few spots of blood. That is probably why it is also called spotting. If the bleeding is barely noticeable, the chances are that it was an implantation bleeding. Most of the women who do get an implantation bleeding have no symptoms other than the bleeding itself, but if you do notice symptoms like cramping and tender breasts, that does not mean that your bleeding must be a period.
Some women do have period-like symptoms with their implantation spotting. These are, in fact, very early pregnancy symptoms. Ladies who are trying to conceive probably have a few pregnancy tests lying around the house. If you think you might have had an implantation bleeding, there is no harm in peeing on a stick and seeing whether your pregnancy test turns up positive. It does happen sometimes, even at this early stage.