Metallic smell?

I’ve had the copper IUD for a few weeks now and I’m my period just ended like a couple days ago and I’ve noticed my discharge is thicker, whiteish/yellow and has a metallic smell to it. I saw my OB yesterday she tested for BV and a yeast infection and both tests came back negative. I don’t have any itching or burning or any other signs of an infection I’ve also been tested for STDS and everything came back negative. Has this happened to anybody else?