Thrush can lead into swollen taste buds
Depapillation of tongue often results in swelling of taste buds.
I would advice you to floss your tongue daily with tongue scrapers.
Maintain oral hygiene
Rinse your mouth after every meals.
Avoid intake of allergic,spicy food stuffs.
If symptoms persists,please do visit a dentist
Meanwhile,vitamin c and iron supplements
has to be administered.