Hi. I noticed a faint surface scratch on my front tooth. I’m panicking that it’s going to crack or something. Is this normal? It’s hardly visible and  it’s very faint. Could any toothpaste help or could it strengthen and disappear on it’s own? Also, someone told me that it could just be a natural line of the tooth. I’m very conscious of my teeth so hopefully I’m just worrying about nothing. I hope you can put my mind at rest. Thanks.