The mouth usually heals fast. Give it a few more days. Stop poking at it and you won't even notice when it's gone.
and what the hell is magic mouthwash?
refers to a lot of things. in the pharmacy usually its for people undergoing chemo. they have a compromised immune system and are prone to infections, including the mouth and throat. Usually its a mix of benadryl and an antibiotic. But it could be many other things.