Skyla no period

I have had the Skyla for a little over a year now. My periods have been spot on almost down to the hour I will start. I had two weird periods last month. Like normal then off and less than a week later I started again. It was really light. I know your periods have a chance of going away. But there's also a chance of pregnancy. Me and my husband have been careless about pulling out and I'm 7 days late for my period this month.

I just wanted to know if any one has gone through this? Thanks for listening!