AF question, no picture!

I've never seen this much blood in my life. I've ALWAYS had 2 day periods, with very little blood, I've never even soaked a panty liner. I've lost a few clots since giving birth but I've only had 3 periods, and this was suddenly the worst. (6 months pp) it looked like a murder scene when I woke up, it was literally dropping out of my tampon and a few very small clots. What's going on? I never had my 6 week pp check up, should I see a doctor?