kinda scared... iud

sooo i’ve been with the iud for a couple months now and ive had crazy period like bleeding for 15 days and stopping for a week then bleed for 15 days again. so me and my boyfriend haven’t been using any condoms or anything bc like i don’t feel like i have to and i’m 16 so im dumb and stupid but anyways we’ve been doing it almost everyday and stuff and now i’m ten days late on my period i don’t think i’m pregnant bc im on the iud but i always have that thought in the back of my mind. i don’t know what to do