Yesterday, I stopped the truck and then decide to go again, I though I turned off the engine but I didn't due to loud radio, so I turned the key to start the engine while it is running. I heard a brief grinding sound. I though I saw in some other thread somebody mentioned that our truck has starter protection to prevent it from starting again if it is running. Was this not the case since I heard the grinding, did I do some damage to the starter or fly wheel?