Skyla IUD

Does anyone use the Skyla IUD? I have had mine since the end of a July 2017 and after having 2-3 months with just spotting I started getting regular periods every month roughly 24 days apart lasting on average 7 days. Is this normal with other ladies? After discussing IUDs over the weekend with some girlfriends I am concerned that maybe mine isn’t actually doing its job. I have reached out to my primary health care provider and waiting to hear back from her. Any thoughts/comments/suggestions?