at what point should I see a doctor about hip pain?

I wanna say its been about a year or so I've been dealing with this. My left hip seems to sort of freeze up and be in alot of pain when I rotate it a certain way, or sit wrong on it. leaving me sometimes unable to stand up from where I sit, I also limp and have to force it to go to move or roll it or do a jerking motion back to how I was before or until it makes a pop.. and the pop literally sounds like a pop not like cracking joints pop, like when you put your finger in your cheek and pull sort of pop. The pain sucks it's a sharp pinching sensation. However other then those points which happen very often. I'm considering seeing a doctor about it but I'm not sure if its serious enough to do so, because as long as I am careful with A I sit, and how I move it doesnt happen