Iud question!

So I have the Mirena iud. I got it last February and I’ve had heavy period since then all the way til November of this year and my doctor had said my periods will slow down or stop but it stop automatically. I’ve had some cramps here and there and I’m 14 days late according to my period tracker and I’m sexually active with my boyfriend. ( I’m 19 years old) we don’t use protection and we’re very on top of getting tested just to be safe! Should I take a pregnancy test to rule that out and be safe?