Thanks for the comment. I am sure it isn't my teeth, and could be sinus I guess, as I do have some allergies, and runny nose, etc. I don't have any of the classic symptoms of woments heart attacks, other than the neck. I some times feel like the glands could be a little swollen, but not much. My husband had a stent put in one year ago, and I was the one that recoginized his strange feelings in his arms could be heart related. It turned out he had a 85% blockage and the doctor said he would have had a massive heart attack if not treated. Even the doctor was surprised he had no chest pain or other symptoms, so I know heart attacks can sneak up. I guess thats what I am worried about.
I think you would be wise to get yourself checked out by a doctor, just incase and to put your mind at rest. If you are having any other cardiac symptoms such as shortness of breath, chest pain, nausea, pain radiating down the left arm or anything like that go to the Emergancy department.
It is however more than possible that you could have an infection in your jaw, say, from an impacted or infected wisdom tooth. Tooth pain can often make the ear and neck hurt as well (just as an ear infection can make the teeth hurt...). There is also the possibility that there is nothing wrong with you dentally either and you are suffering from neuralgic pain.
The only other possibility that springs to my mind is that it could be related to a sinus infection since that can also present as jaw pain, and often feels worse when you lean forward.
Either way, get yourself to a doctor, and if he/she doesnt find anything, go see your dentist. Its always better to be safe than sorry.