I Have Been Having Pain In My Left Hip For

I have been having pain in my left hip for well over a year. It has recently worsened and wakes me up several times a week. It is mostly a severe ache that gets better with motrin. During some exercises(like leg lifts) it feels like it will come out of the socket. The pain sometimes radiates down my thigh into my knee. I have had no recent injury to the area.