Kyleena iud

I got my iud inserted just over a month ago (april 24th i believe). at first everything was perfectly fine, i didn’t spot or bleed much or at all after the first day when some of my friends told me they did for a couple of months. then i got my period and ever since i have had this brown spotting going on and when i have unprotected sex when my boyfriend pulls out after finishing a little bit looks brown from me, even though i don’t normally finish. should i be concerned or is this somewhat normal?