Period stuff

Kara • I'll be 21 in January and me and my fiance are welcoming our 1st child February 23rd 2020. It's a boy and his name is Sullivan 💙
So... I was supposed to get my period on Friday and I havnt. I havnt gotten it since I've been put on birthcontrol (IUD) Is this normal? I'm just wondering... Not really concerned with pregnancy (I take a test every other week and plan on doing so for the first 6 months of being on this) I've had the Iud for about 2 months now.