Pregnant on IUD

I’ve had the Kylenna IUD since July of this year and my doctor cut the strings too short for me to check them, however a month after I had it placed I went back for a check and they said everything was fine.

Me and my boyfriend haven’t used a condom since but he have always pulled out. My period is 2 days late and it doesn’t seem like my period is coming anytime soon (My breasts are only sore) Took a test today came out negative but I’m a nut and still need peace of mind from people 😂 could my period finally be stopped by the IUD or could it of been the stress from the holidays?