I was driving home and the lady in front of me got a flat tire and started to stop. I had to brake because I was only 20 feet away and I slammed down on the brakes as hard as possible and my car ended up being about an inch away from her. My brakes squealed really loud and the car kind of shook. I was driving on the highway and when I got to the offramp, my brakes weren't working. I gave as much pressure as I could and I felt the right brake going down, but no pressure from the left brake. Every time I brake, I have to go down all the way and the car begins to slide one way. Also, my brake light is constantly on now. The car slouches to the left a bit down. Is this a problem of the disc brake? What needs to be fixed?