I'm not sure what you mean by an oral surgeon. Is that some kind of advanced dentist?

As has been suggested I would be seeing an ENT, and I would expect they would do some sort of biopsy.

And don't go Googling for a diagnosis, you'll just worry yourself. Not every headache is a brain tumour! Every case is slightly different, and every medical decision is based on a range of factors you might not understand. What you can use the internet for is to help you understand the information the doctor gives you, because it is often a lot to take in and you only have the doctor for a short period of time.

Best of luck and let us know how you go.