No Sex Drive

I’ve been dating the same guy for almost three years now and recently I have had NO sex drive at all. Probably since late last summer/fall-ish. We have sex every once and awhile and he always wants it and I’m just never ever in the mood. We just moved in together about a month ago and things have gotten worse and we’ve been fighting a lot. I’m wondering if stress has anything to do with it or I’ve had my IUD for a year and a half, has anyone else had this side effect? It’s really taking a toll on our relationship and I think it’s a reason we fight a lot. Any help or tips?