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

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