How long have you had this issue? Has it coincided with a recent brake fluid change? I'm asking because a recent brake fluid change done badly can cause more problems than old brake fluid left unchanged.
From what you describe, it sounds as though you may have some air in your system. A hard pedal without the engine running is normal. Having to pump the pedal a few times to get a better response is symptomatic of air in the system. I'd start at that point and go from there.
From what you describe, it sounds as though you may have some air in your system. A hard pedal without the engine running is normal. Having to pump the pedal a few times to get a better response is symptomatic of air in the system. I'd start at that point and go from there.