I just noticed tonight that behind my farest back teeth I see something coming out, scratching it with a toothpick it felt and sounded just like a tooth, I guess its my wisdom tooth... But Its gray! I don't know if it is, I've been using dipping tobacco for a year now ( tobacco you place under your lip ) and then of course I fear cancer... What do you think it is?

In all honesty it is too hard to tell over the internet. You should make an appointment with a dentist to get an accurate diagnosis.

But wouldn't there be possible to say something that it might could be? I hate being insecure about it hehe.

Well I guess it could be the spawn of a space alien, but it could be bone, it could be a wisdom toothe ( but they are not grey) it could be some growth from tobacca use. Unless you just go to the dentist and have it checked you will not know.