Picture Of An Ulcer On Gum Is This An Ulcer? If So Is It Oral Cancer?

Is This an Ulcer? If so is it Oral Cancer? - picture of an ulcer on gum

I have OK, one of those people who are very afraid of the disease, but this time I am literally afraid, "my mother said:" It's probably under the tongue is taste. Take a look and you tell me. The picture makes it looks a little different, but http://s954.photobucket.com/albums/ae23/RLeeHarr1997/