confuse

Asmara
I Removed my Copper IUD from doctor and next day started my ovulation days we had very good sex because I want to get pregnant. But one day before my period due date I did pregnancy test and it turns nagative but I didn't get my period yet. My period due date was September 13 and I always get my period on due date or before due date never late. But this time one week past and I didn't get my period! So should I try an other pregnancy test or my period are late be oust of Coper imIUD removal?? So confused please help!!!!