I'm not supposed to get my period for approximately 15 more days but I'm having a lot of cramping as if I'm getting it tomorrow. I've also been having mild cramping all week. I took a pregnancy test 2 days ago because I've been having a lot of early pregnancy symptoms. My test read negative. I am also on birth control. I really don't know what to think because now I just spotted. Is this implantation bleeding? Is my pill missing with my system? It's so confusing