Light

Ok I'm on my Period right now and my flow is freaking weird !!!! I'm wearing a panty liner and spotting ( currently day 4) but when I pee I see clots and more blood ...... Not to be confused there is no blood in my urin ..... Just clotting 
My body feels tingly like I can feel blood pumping through my veins.... 
My Ariolas are dark sometimes and then light ....
What the hell ? I don't think I'm pregnant because I'm getting negative results