Any home remedies for mouth ulcers?

I have had quite bad mouth ulcers for more than a week now, and even though theyve gotten better slightly i dont know what to do to get rid of them completely. They are quite huge, and im scared someone will notice soon! Bonjela doesnt seem to work, saltwater helps but doesnt heal it, tried antibacterial mouthwash and tcp... at a loose end guys! HELP!