Can there be a slight situation that a blood pregnant test can be wrong. My period came 2 days earlier than glow predicted on  Jan 7 and lasted 5 days as normal. I haven't been keeping that great of records as far as when I ovulated or not. I have been having g spotting for 4 days now. I know it's not my period because the amount of blood hasn't increased, it's not enough to fill a light tampon over night and it's a dark reddish brown color. And I don't have any cramps just reall sore breasts. I got blood work done yesterday and the land came back negative. Can it just be too early? Can still be pregnant? Can this be implantation bleeding? Please help!!!