Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
As per your complain you might have following problems
1. Ulcer or cancer sore
2. Traumatic ulcer due to hard brushing
3. It might be result of viral infection such as herpes
4. Rarely it might be a cancer (
squamous cell carcinoma).
Symptoms of mouth cancer can include:
1.A persistent visible mass or lump that may not be painful.
2.An ulcer that won’t heal.
3.Bleeding from the mass or ulcer.
4.Loss of sensation anywhere in the mouth
As you have some of these features, you should immediately visit a oral physician
Don't worry you would be fine
Hoping your query is solved.