Paragard copper IUD, no period

Sasha

Hey guys! Since being in my 20s, my periods have been becoming a bit wonky. A week early or late. I had the copper Paragard IUD put in about 3 months ago, plus I have a LDR in which I have sex irregularly. I'm currently staying with my boyfriend and we had sex a week ago (no sex recently but I am cramping). My period is a week late. I spotted pretty heavily after my last period so I'm a little lost lol. Has anyone experienced periods being weird with the copper IUD? It doesn't have hormones so it confuses me why my body is acting like this.