Brown discharge a week before period with copper IUD, is this normal?

Maizazia

I have the paraguard IUD, and have had it for about a year now. I've noticed that for my last several cycles, I have been getting a light brown discharge about a week before my period starts. Sometimes it is clearly old blood but other days it looks more like a creamy brown, which concerns me. Is this normal? There's no smell really and no pain.