I am 38 year of female and just in the past few weeks have suddenly developed a pain in my left hip. It happens when I get up from a sitting position, suddenly my hip will be really sore,difficult to straighten and I have pain walking for a few steps. When I am still I don't feel it, and when I am standing or lying I don't feel it. It is only afternoon unbending my hip from a bent position that is is quite painful, and only on the left side. Any ideas what this could be? I am very nervous about it.