Pregnancy Test

I have had the Kyleena IUD for about 4 years and have consistently had a period every month. Although I now haven’t had a period in 55 days - Since January 19th and my period was only 2 days which is very short for me. My boyfriend and I live together and have unprotected sex quite often.. should I take a pregnancy test or is my body just readjusting to the IUD? Does anyone have a similar experience? 🤨