Hmm, sorry the waiting on tax return thing sounded distinctly American, my mistake. I don't know the relative costs there but a checkup here is typically 90-120 USD. You can usually refuse things that 'cost' more like x-rays and the like if they recommend them. Might get you an idea of whats going on. Teeth are important so it might be worth spending in the short term just to make sure there's nothing systemic going on rather than rely on self diagnosis.