How to stop vaginal discharge from IUD:

please help! I absolutely love my iud but the past 6+ months have been horrible with nom stop greenish/ yellow discharge so bad that it drips down my legs the second i take my panties off. I havent been sexually active but i was still tested multiple times for stds. Its not bv, idk what else could be causing it! It smells absolutely disgusting and its a strong smell so i know other can smell it too. I only had my mirena for 10 months and i thought i loved it because i dont get periods anymore and its not something i have to remember to take everyday. 

Has anyone else has this happen to them? Did it go away after being removed?