pregnant??

I am currently 3 days late and a day before my period I took a test and it was negative. My boobs normally hurt a week before my period but they do not hurt at all.  My stomach is queasy in the mornings and at night and I think I had implantation bleeding about 5 days ago it was light pink and lasted two days. Also I am crying over completely nothing at all I just cry like if I miss my boyfriend I will just cry ".  Could I be pregnant??