This is a pathologic puzzle that needs to be solved since it affects only one side. Your dentist will take X-rays after he examines your teeth determines what can be the cause of your symptoms. It is possible that your teeth have shifted causing TMJ pain which can be referred as your bite shifts, also could be parodontal destruction which are the supporting structures of the teeth themselves through neglect and keeping routine check-ups with your dentist. Many people do not realize that dental problems cannot be postponed indefinitely as they tend to get worse and cause more damage. Ultimately your entire state of health can be affected by for dental care. So the answer to your question is not so important that you get it quickly, but that you take some time and actually discovering which set of symptoms can give rise to your particular problem, muscular skeletal, decay of the teeth, Orthodontics shifting of the teeth, or trauma Associated to damaged tissues. All of these symptoms can give rise to the problem here presenting your dentist will determine by your treatment plan how best to proceed, solving emergency problems first.