I had Paragard for 2 years and was like clockwork, always getting period on 1st of the month. Didn't get it this month and turns out I am pregnant. I am devastated. GYN acted like it wasn't that unusual. I thought I was getting Paragard so that I didn't need to worry about this for another 10 years. Well, that wasn't the case. So upset right now. If I were you, I'd call your doc to check the position of your IUD and see what's up.