Implantation cramping? Could I be?

Nickey
I'm not due for my period for another week but for the past couple days I've been cramping, similar to before AF cramping but no bleeding what's so ever and just excessive discharge.  I keep feeling like it's coming and find myself going to the bathroom constantly to check but nothing. I've also been having some breast soreness and shooting pains. 
Has anyone had this type of cramping one week before period and ended up with a BFP??