I have had "burning mouth syndrome" for over six months, noothing is working what could it be?

Burning Mouth: Burning mouth syndrome can be a complex disorder, and may be caused by many factors -- start with a visit to your primary care doctor, and be prepared to see an ENT doctor or neurologist in follow up. Sometimes, the symptoms disappear on their own, but a good workup for reversible causes should be undertaken.

Maybe too dry: Use biotene to get proper moisture in the mouth.