I had just started my period last night about 11pm I had some cramping and alot of pink blood. The cramping went away after 10 min. I went to bed and woke up today and there was no cramps at all. I went to the bathroom an the blood went from pink to red. I went to the e.r and they gave me a blood pregnancy test and it came out negative. But I have been bleeding all day didnt start cramping till I got home from e.r. And I have been feeling like I'm gonna throw up and have been having hot flashes all day..i'm a week early for my period.. Can anyone help me?