Yesterday I put oil in my car and forgot to put the oil cap on . The oil light kept flashing and didn't put oil in it until today before I went to work. As I drove to work my car started making a very aggressive noise and all of a sudden smoke comes out the engine. The temperature gauge didn't show the car was over heating but there was an oil trail. Later , when I started the car it's still started but made an aggressive noise. What could have happened ? Did I kill my car?