is this normal after birth?

ma

so may 6 my baby boy was born. i stopped bleeding 3 weeks PP, on June 17, i got Liletta IUD, but only bled for a day with it, then on June 25 i got my period back. very heavy for 8 days then slowed way down then came back & now it’s currently been 2 weeks of bleeding which i thought was my period. is this normal after labor or it is bc something’s wrong with the IUD or what?