It is unlikely a tumor but the only way to know is to see a doctor.
Do you have any problems with your jaw or teeth? Sometimes mouth pain can radiate to your ears and your head. A brain tumor has many symptoms of which you have not mentioned so I do not believe that that is what you are addressing, but if you are nervous its always best speak to your physician so they can address it properly. The achy leg does it come and go with the pressure in your head? Or just spontaneously? It could be a completely different problem, one I would also discuss with your doctor.
I hope something I said helps. Good luck and please keep us informed.