I had new calipers, rotors and brake pads put on my car and had them bled. Afterwards the brakes went all the way to the floor. So I was told I needed a new brake master cylinder. Had that put on, brakes are still going to the floor. Now I'm being told I need a new brake booster. My brakes stopped fine before all this work and new parts. They were just squeaking. It drove me crazy, but now I wish I had just gotten use to it. Can anyone tell me why this is happening?