Burned Tongue syndrome

For the last 5 weeks I have been experiencing a burnt sore sensation with my tongue, more so on the one side, first thing in the morning IT looks like the side of my tongue is scalloped, been to dentist thinking it may be a dental problem, although i did have a problem tooth, that i believe is now healed, so back to the doctors for the second time…they have no clue? no taste buds, metal taste all the time, am really fed up now…anyone out there have any home remedies and similar story…I had a zelondronic bone infusion in March, Im convinced thats the culprit…
Thanks