3 days postpartum

DJ

Bleeding has gone down but when i pat myself dry a long thick string of blood is coming down it won’t all come out.. if you much it together it looks slimy.. is this blood clotting? Nothing is coming out in chuncks I still down and it slowly comes out super thick very red.. should I call my dr? Also cramping a lot and left boob is hard and very sore and very heavy. Been feeding baby on that side more bc it has more milk in it and it hurts.. FTM!