steering,When I turn at low speed the steering makes noise

I am sure that the steering in my 2007 Toyota RAV4 has something seriously wrong with it. At around 55,000 miles into owning the car, it starts to sounds kinda clicky or creaky when turning at low speed. This really wasn’t too much of a problem, but now steering is becoming more and more difficult and the sound it a nasty clunk. This car is not that old so if I end up having to replace some big steering part I am not gonna be too happy. Is there something wrong with the power steering?