Abnormally a lot of white discharge with IUD

Vanity
I have the skyla IUD since sep 2015 and my periods have been different for the first six months. So I haven't got my period for two months now. There is times I got strong cramps and have thought I was going to get my period but didn't. But my main concern is the past two days I got a lot of white discharge. I was wondering if any one had this happen to them?