HELPP!!Nonhormonal iud 3 weeks late

ALESA • Military wife and a sweet baby girl 3 fur babies

I got this iud put in a year ago I have always had a period before my daughter and after the first few months I got it on a normal pre baby cycle day and haven’t had a late one since what’s the chances that I could be pregnant pretty darned worried any suggestions? I have little cramping but goes away fast and I had stringy cm with little thin thin blood but then nothing everytime after that