thanks for your query.
I think you need to check your hemoglobin
. you may have some vitamine
If Flexible scopy is fine. Only thing you have is mucosal pathology, could be a mucositis
due to vitamine deficiency.
Better to take Multivitamines supplimentation
Also take syp sucrafil, gargle it and swallow, it will coat the inflammed sites and improves healing.
Thanks take care.