Non hormonal IUD (lilleta)

So in late October, I had my 6 week postpartum check up, all normal, my postpartum bleeding stopped just 2 weeks prior, and felt great. I decided to use the iud for birth control because it’s easy, no hormones, no pains, just 2 seconds and done. But since that day, I’ve been bleeding, STILL AM. And I get period cramps off and on all the time, and apperently my husband can feel the threads. This is my first time ever using birth control so I don’t know much. Anyone know how long the damn bleeding will last and does anybody’s partners feel iud threads too??