Hello! I'll do my best to answer you.
My best advice would be to get an x-ray, ASAP. Why? An x-ray, taken in a couple minutes by your Dental
office of choice, can quickly see, what is likely causing the problem. Common causes, are: beginning decay
, possible abscess
, etc. Also, an inflammed periodontal
ligament, which would indicate something simple (easy) needs to be done, such as smoothing down a possible high hitting crown
So, while I'd be guessing to say specifically "WHAT" it is, without an x-ray, I'd strongly suggest you get one quickly from your Dentist
, and he or she can then diagnose the problem much, much more efficiently & correctly! I hope this helps!