Help!

My period used to be super regular and completely normal, but over the past two months it has been super late and really light if any at all. I also have to pee way more than usual and I’ve taken pregnancy tests and they’re all negative. I think I may have a hormonal imbalance just based on all my symptoms but I just wanted some input! I’ll also add that I have a copper IUD, but I’ve had it for over a year.