Placed Mirena. Itching In Vaginal Area, White Discharge, Red Marks. Just Heat Rash?

Just got the Mirena about 6 months ago. I ve been getting a itchy/ burning around the vaginal area. Could it be just a heat rash? I also get this whitish clear discharge and I always have to wear a think pad because of it. I also get these red irritation mark kind of resembling a heat rash but also look and feel like cuts when it s really bad. This problem goes away and then maybe a few weeks or a month later it comes back. Please help :(