what in the world??? confused here!

Ok, so I had unprotected sex with my now ex bf on new years eve.
he said that he didn’t ejaculate but i didn’t believe him.
just women’s intuition, i guess.
well on thursday, i had brown vaginal discharge. on friday morning, it was still brown but with pink in it and it was light.
then, it got heavier.
on friday, i took a test. it was negative, but faint.
by saturday night, it was light pink again and then just stopped altogether. i was thinking that i was done. WRONG! On sunday, i was bleeding heavily again and it continued off and on, even today.

can someone help me?
no, i’m not on birth control.
i’m getting really freaked out.