6 days Late Period, Paragard, Spotting

Mariah

My last period was July 31- August 5 . I was suppose to starting August 21 but I haven’t gotten anything close to what my period was. I’m a heavy flower , & lately I’ve been extra crampy , and noticed more mood swings changing. My period doesn’t ever spot, so for me to have a pinkish discharge when I wipe and dropping a 3 droplets of blood I’m lost. I’m 20. Am I pregnant or is it my IUD Messing up ? Has this happened to anyone ?