anyone experience this? TMI (no pics)

Kristin
Hi, so I'm currently on day 12 of bleeding with no show to an ending.. my periods normally only Last 3-4 days and are super heavy with horrible cramps but no clots, however this one (whatever it may be) is abnormal :/ it started out brown, then became gradually bright bright red and heavy to the point that I made it through two boxes of pads and 3+ boxes of super tampons in the past 2 weeks. It's been ALOT of clots with no cramps for the most part. If it wasn't clots it was like thin red blood. Confused on what is going on with my body and thought I'd get some insights from y'all. I have a call in to the obgyn in the morning but due to holidays they couldn't do anything last week when I called. 
***UPDATE***
I called my obgyn this morning and they are sending orders for bloodwork to check for anemia and sending me to do a ultrasound and see her  Thursday