My 6+ month old has had her two bottom teeth for about 5-6 weeks now. I was feeding her some cereal yesterday and noticed that the back of her teeth look dark(brown?). Her teeth aren’t that high up, so I’m not sure if it’s actually the back or closer to the top ridge that is this color. I tried wiping with a cloth and it doesn’t seem to come off. Has anyone had this happen before? I am just worried she is missing enamel or something.