Postpartum bleeding…HELP!

I am 3 weeks pp and my bleeding has slowed down quite a bit lately. Today I was traveling and when I checked into my hotel I could feel myself bleeding so I went to the restroom. When I got in there I realized I was bleeding a lot and on the floor. I passed a big clot about the size of a cutie orange. I changed my pad and soaked a pad in less than 5 minutes and passed another big clot. The bleeding has since slowed down back to normal and I am not hurting. Should I go to the ER?