you had ENT infection and it is treated by the doctor, now you have apthous ulcers, that could be due to multivitamin deficiency
, riboflavin deficiency
, or could be due to stress
associated with the ill health in the recent past..
see your physician for this, get a prescription for multivitamins, probiotics and analgesics..
take some bacterial anaesthetic oral applicants for rapid healing..
all the very best..