Great news that the burning is gone...but the cankers must be annoying. It might be worth having it checked out to see if there is a fungus (thrush) causing them.
There are good meds that can help to treat fungal infections that cause cankers in the mouth.

Often the tongue is coated in a thick whitish paste when there is fungus present. Some people find that fungal infections are common after a round of steroids like prednisone.

Wishing you a speedy recovery

With love, Erika