Oral cavity symptoms and conditions

I began Doxy in Sept of 2007. The first week into it I noticed the roof of my mouth felt strange, kind of rough and sore. I attributed it to the drug and figured it would go away once I was off of it. I began to get a very sore tongue which I attributed to candida....it was a little white too. I was on the drug for five weeks and the mouth symptoms never went away, just went on to become a chronic burning tongue and mouth. Scalded feelings in the mouth as though I had slurped boiling hot coffee. Also, noticed I began feeling very tired and melancholy on the drug....those symptoms have never really gone away. It's been nearly a year and I have tried multiple remedies for my mouth and nothing helps. Has anybody else had the burning and inflammation feeling in their oral cavity. It shows no outward signs.

After using for many months a rectal cream I developed paresthesia of hands and foot fingers, oral cavity and dysgeusia (bitter and metal taste)