yellow / brown discharge

i had a paragard copper iud placed on friday january 28th, (it’s saturday feb. 5th currently) they inserted it while i was on my period and i’ve been off of my period since sunday but i’ve been having yellow/brown discharge since my period ended. i usually have it for another day after my period but it’s been almost a week and i’m pretty concerned. the discharge doesn’t have a smell anymore but it did until about 2 days ago. my boyfriend and i have had sex 3 times since i’ve been off my period and he has came inside me everytime.. could it be from him ejaculating in me? or is it from the iud?