Ok so when we got my e-ring it fit pretty well perfect. Didn't need to be resized or anything. Well lately I've noticed that it's really loose. I don't think that I am loosing weight, (FI says that the e-ring is gaining weight haha) I know what causes my fingers to swell, but what would cause my fingers to shrink and how long should I wait before I think about resizing it?

I don't want it to fall off and not be able to find it.