What could it be!?!?!

Zaire
So Tuesday I started spotting and didn't think much of it since i knew I was ovulation. Thursday afternoon I started bleeding heavily and today it's flowing even heavier along with some pretty bad cramping. My period ended about a week and a half ago so it can't be that. I also never have cramps during a period so this is new for me and I never ever had a heavy flow. I don't know why I'm bleeding! It's freaking me out. I also took a pregnancy test yesterday and thought it was negative until this morning when my husband noticed a VVVFL. I looked again and saw it as well. But it's soooooo faint you guys, I really can't be sure if I'm actually seeing a line or if my eyes are playing a trick on me. What could be going on? I can't go to my doctor until next week. HELP!!!