Do I smell funk?

Katherine
I have had a copper IUD for about 6 months. I love everything about it, except I have noticed that when I am NOT on my period, I always seem to have a terribly rank smell hanging around my crotch. I don't think others can smell it, but I can, ALL DAY. 
It makes me very self conscious. I have only noticed it since getting my IUD, and what's weirder is I never notice a smell like it when I'm actually on my period. 
Is this smell caused by the IUD? Or could it just be from lifestyle/hormones/diet?
Is there anything I can do to eliminate this problem?