NEW GREY SPOT IN EYE getting darker.. from contacts?

Even with dry eye, the guy prescribed me toric lenses which are supposed to have a longer lifespan than I shred through them. Since wearing them, I noticed a grey spot on the white part and now it is getting darker. I know this has happened to other people because I see them with REALLY dark grey spots close to where the contacts go. I have stopped wearing contacts, but the spot is not going away. Does anyone know what this is, or how to reverse it? The guy said to relieve "dry eye" to use warm washcloths to improve circulation occasionally, but that does not seem to make the spot go away, I don't like it! I cannot find any answers online. Help?