If i got my period and than a week later got it again does that mean i could be pregnant?

First I will always say that unless you are abstinent, there is always a possibility of being pregnant. It could have been implantation bleeding but you can also have spotting for several other reasons ( stress, hormonal imbalance, extreme change in diet/exercise, etc). Implantation bleeding is the result of the fertilized egg(s) implanting itself into the uttering lining which results in bleeding and occasionally abdominal cramping. This form of bleeding takes place six to twelve days after ovulation. ( A females ovulation generally takes place 14 days before her period). There will not be a large amount of blood, some women may not even notice any. Implantation bleeding only lasts a couple of days, this is the way to compare and contrast the difference between implantation and menstrual bleeding. You must keep in mind though that not everyone will experience implantation bleeding.