Hi-over the last 2 days, I noticed a soreness under my tongue. It would come and go, then if I ate pretzels, my entire mouth felt like it was burning. It would go awaye, then come back during eating sometimes. My frenulum is swollen and very tender. What s going on? Have never had allergic reactions to anything. I think I might have a yeast infection...I have alot of candida...can that be part of the problem?