Pregnancy on paragard?

Okurt

This will be my third period on paragard. The first two periods I had started out on the same day with slight brown/Pink spotting on and off and cramping. But now I started spotting a little with slight cramps on and off but my period never showed. I’ve taken home pregnancy test and both came back negative. I am now like 5 days late and am really concerned. What do y’all think?