a blood test will show for sure if she is pregnant.
implantation bleeding? she said it lasted for like a few hours and she did use a pad but there was little blood on it.
it could be implatation bleeding how long did the bleeding last and what color was the blood was it heavy or light . did she haev to us e a pad or tampon or nothing at all? if she didnt have to use a pad or anything she might be pregnate. but i would take a first morning urin test and then if that comes out negativ ethen i would wait a week and restest keep me posted
bye
Try testing if it comes up negative then retest in a week if she still doesn't get her period if still negative go to her doctor and request a blood test