My brakes suddenly started making a grinding noise that’s worse when I’m at low speeds and pushing down on the brake all the way, I had my brakes checked a couple of months ago and they were all at 8mm but I do drive for work so idk. It came up suddenly, I think it might be because I’ve been driving in a lot of dirt and rock filled areas and it might be dust build up or something like that? I’m gonna get it checked as soon as possible, but I just wanted opinions on what I could expect.