Hello dear,
Please be calm
It's nice that you have taken precaution.but I suggest you to please update which gel you have applied and what type of ulcers are there.
Reason being ulcers are of various types and sometimes are accompanied with fever and malaise
Next Steps
please share clinical pic for right diagnosis, best treatment and speedy recovery
Health Tips
I know they are just ulcers but 6 days are more than usual healing of a simple mouth ulcers