Hi, I Have Had A Sore Tongue For Several Years,

Hi, I have had A sore tongue for several years, Going on 8. It started with sever thick mucus and swollen. Th one time pill for yeast infection was given and it got better within 2 days but was worst again by day 5/After several pills I gave up and suffered it out. The flare up got less and less but lately its flaring up again no one knows what it is, No Dr can help me.