Burning tongue is a symptom of Vitamin B12 deficiency. If I were you, I'd ask the doctor to check your vitamin B blood levels to make sure you are absorbing enough from your diet. If any are low or low-normal, I'd recommend asking if it is ok to take a daily multi-vitamin or even just a B Complex supplement. Don't wait too long - B vitamin deficiencies can cause nerve damage.
Gluten & Sulfite Sensitivity, Multiple Food & Inhalant & Medication Allergies, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, Very Low Lymphocyte Counts (T-Cells & B-Cells), malabsorption/malnutrition, etc.
Meds: Pulmicort, Injectable Vitamin B12, Herbs, Nutritional Supplements, Essential Oils, Homeopathy.