Bleeding nonstop.

when i was 4 weeks pp i stopped bleeding. then around 6 weeks, i started cramping and what i thought was my period started and lasted for a constant 5 days. its now been 2 weeks and i havent stopped bleeding. its been spotting each day or every other day. i did have the iud placed in but that was only 3 days ago. im confused on where this is coming from.