I can feel something move in my bottom right side jaw and then my jaw locks up and hurts to move i have to sit still for a few seconds for it to go this happens fairly rarely but still very worried about it it feels like a bone has came out of place?

Your jaw issues should be evaluated by a dentist, preferably an orthodontist or an oral surgeon. A nocturnal dental splint can be helpful in milder cases, but etiology and severity need to be assessed.

Not a bone. A cartelagenous disk in the jaw (Temporomandibular) joint. Your Dentist or a specialist Oral Surgeon, Orthodontist, ENT, or a Dento-facial Pain specialist is the appropriate place to start the diagnostic process. Te TMJ is a unique paired joint, not easily diagnosed or treated. Please seek evaluation.