I have had pain on the right, back of my tongue for the last two days. It hurts to eat or swallow on that side. It looks slightly white with a little bump. The main change in my diet over the last few weeks are salads with romaine lettuce, beets, blue cheese, craisins (cranberry raisins), mushrooms, tomatoes, and almonds. Could this be causing it, such as excess acid or what could be causing it? Thx