Can Pregnancy Occur Despite Using IUD?

Hi, may I answer your hi,i m 28 yrs old.i have placed iud from last 3 years and i always get my periods ontime.but this month i missed my periods.i m 10 days late now and i still not get my periods.i did the pregnancy test today at home.it comes negative.i wanna know is there chances of being pregnant or nothealth queries right now ?