What does it mean when u cramp a week before ur period, the whole 5 days as if u were on ur period?

No easy answer: It depends how long these cramps have been a problem. If the are of recent onset, and they are accompanied by a new discharge and pain with sex, and or fever, infection must be considered, and you need medical attention right away. If this pattern is of gradual onset over the years adenomyosis might be the cause. If your periods have always been like this, then you could have endometriosis.