I had all my wisdom teeth out in my 20s, 2 in the dentist and 2 in hospital. Mine healed fairly quickly. Can you call for advise? I know you’re on antibiotics but they won’t help with ulcers. Looks like you have a special mouth wash, which I would assume should treating but they may need to swap to something different.
After all you’ve been through you don’t need this. Fingers crossed it all heals soon.
@sn25 Welcome to the group. Hopefully somebody else that had your treatment plan can advise about the EC.