I get quite a few mouth ulcers (usualy due to stress or illness), yesterday my mouth felt sore so thought i was getting another but this one seems to be huge and has what feels like a hole in the middle and raised around the edges, its on the inside of my cheek, near my bottom gum (hard to explain). Have never had one like this before or that close to my gums. Does it sound like a ulcer? i cant remember hurting myself or anything.