well its hard to apply brakes moderately, very little pedal movement in they grab hard, its almost like maybe an inch of movemnent and then its rock hard like the cars not running.
OK...
When you say "rock hard" like the car's not running, that sounds like a different problem.
Sorry, you need to try and be more clear.
If you are saying that the feel of the pedal is the same when the car is running and when it isn't running, then YES that sounds like booster/vacuum problem.
When you say they are very sensitive, I take that to mean a small push and the car STOPS ROLLING.
If you mean a small push and the pedal is rock hard, then that sounds like a bad vacuum.
You can easily check vaccuum by running the car, shutting it off and pressing the pedal. It should go down easily once or twice then become VERY hard to push.
You can check the line to the booster visually, and then check it for vacuum easily by running the car, shutting it off, then popping the line from the booster... you should get a pop sound as you break the vacuum. Or you can simply pull it and run the engine to ensure it is sucking
Be aware that you're pulling unfiltered air through the vacuum hose though when doing that.