don't know what I'm feeling.

Well for the people that have not  seen my previous post I went from having a period around April 5 to not having it again until a few days ago.  Now I'm bleeding heavy and  in a lot of pain.  I'm wondering if maybe I had a miscarriage???   I haven't seen anything weird come out that I know of but abdominal pain is like nothing I have ever felt before.  It feels like someone is cutting me open on the inside.  I keep getting a pulling down sensation on stomach and sometimes when I sit down, it feels like something stabbing up into body.  And hurts to move around or even walk.  I already have an apt set for the 15th because I thought I was pg and was gonna ask Dr to do blood test because All at home test kept saying neg.