I have read your question,
By the Symptoms you have given above , the issue could be due to fungal infection
, vitamin deficiency
, sensitivity to toothpaste , or bacterial infection.
Symptoms of gluten sensitivity
may include bloating, abdominal discomfort, pain, or diarrhea; or it may present with a variety of extraintestinal symptoms including headaches
and migraines, edema, lethargy and tiredness, attention-deficit disorder and hyperactivity, muscular disturbances as well as bone and joint pain.
Since you didnot mention any , I think the posibbility of a gluten reaction is less,
I suggest you to take vitamin rich foods like citrus fruits , indian gooseberry , green leafy vegetables etc.
Along with it take antibiotic and anti-inflammatory tabs(until the soreness reduces) and multivitamin
capsules atleast for a week.
I recommend you to consult a physician nearby for further guidance
Wishing you a good health,