Hi..
Thanks for the query..
As per your complain bumps at the back of tongue along with whitish yellow coating that cannot be brushed off seems to be most probably due to
fungal infection in mouth known as Oral Thrush caused by Candida Albicans fungus..
Bumps at the back and sides of tongue seems to be due to inflamed and
swollen taste buds that are commonly seen due to infection causing inflammation..
For a confirmation you should consult an Oral Physician and get evaluated and a thorough clinical evaluation and investigation like microscopy of the coating from tongue can help in diagnosis and treated accordingly..
In case of Oral Thrush you will be advised to gargle with antifungal mouthwash like Nystatin mouthwash, suck
Clotrimazole lozenges and take a course of
oral antifungal medications like Fluconazole or
Itraconazole for atleast a week..
Along with it take plenty of Probiotics like Yogurt and garlic..
For sore throat do warm saline gargles, suck throat lozenges and take anti inflammatory painkillers like Ibuprofen..
I hope your query is resolved..
Regards.