I know this is more than likely a very stupid question, but I am still learning. I was at practice yesterday and all of a sudden my D string on fret 10 started to buzz and fret out. I noticed that on that fret the string had a dimple in it (dont know what to call it) it looked like the fret had pushed in the bottom of the string and it stayed that way. So my question is, do I just need new strings or is there something wrong with my bass. The string are only a little over a month old, But I practice every day for at the minimum 2 hours, usually more. in case it matters, my bass is a 4 month old 2011 Fender American standard P bass and, the strings are DR sunbeams. Thank you for any input.