Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns....
As per your complain white coating over your tongue seems to be due to a number of causes like reduced immunity, intake of steroids and antibiotics,
diabetes,intake of Oral contraceptives,
Dry mouth etc..
The red bumps at the back of tongue seems to be swollen Circumvallete Papillae which are present at the back of tongue and contains
taste buds, they seems swollen secondary to infection..
-You should consult an Oral Physician and get evaluated and a thorough clinical evaluation can help in diagnosis..
In case of Thrush antifungal medicines like Nystatin mouthwash and
clotrimazole lozenges and taking ample of Probiotics like Yoghurt and Garlic will help..
Do warm saline gargles and suck ice pops for relief from the swollen papillae and take
Ibuprofen if there is pain or soreness.
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..