SInce its gotten cold my power steering has whined for maybe 30 seconds when I start it up for the first time in the am. How ever when I went to start my car to let it warm up before leaving work it whined horribly and would not go away even when at operating temp. At a stand still its the worst and as speed up it gets better. Also there where tiny bubbles and it looked like fluid was getting pushed out from the resivor. Is my pump shot?