IUD insertion, first period?

For those of you who have had an IUD. How long after insertion did you get your 1st period? I’ve been on the pill for almost 6 years and my periods were always regular. I should’ve gotten my period a few days ago (IUD was inserted last month, one week after my period) Yet I understand this is a change and hormones. It’s just a bit new for me! Just wondering how long it took others or if they never got it at all after insertion!