HELP! please read!

So AF was due 1/1. Was spotting for 2 days. Then heavy flow 2 days. Stopped bleeding for about a day & 1/2. Boyfriend and I tried having sex the night my period was done because there was no signs of my confining to bleed. 
I bled everywhere, it wasn't like period blood at all (thought it was my period continuing) , and I got extremely dizzy. I've had lower stomach cramping but it's like sharp pain for two days and I've continued to have this spotting. I've been so nauseas but tried not to pay attention to it until I just started throwing up.
As much as I hate the idea of talking to my mother about this, I called her and she doesn't exactly think I should worry about it, but thinks I should make an appointment ASAP but I'm worrying. 
My AF is usually 6 days heavy flow. 
This isn't normal for my body whatsoever.
My friend thinks this might have been a miscarriage but I had taken a pregnancy test Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and it was negative.
I just really need some advice because I am worried and have no idea what might be wrong.