Why does my tongue feel sore. have had this going on for several years gp didn't seem to know why's also i feel tired most of the time. blood count shows low white cells but this is normal for me for the past years?

Vitamin deficiency: We need a lot more information but would look at vitamin deficiency as a possibility. It seems too long for a yeast infection. If you are on medications consider a medication side effect.

Sore tongue: Lysine supplement has been known to help with burning tongue syndrome. Your complaint of feeling tired and low white count brings up other questions. A full blood panel and evaluation from you md is recommended. A dermatologist that specializes in oral conditions would also be helpful.