The other week my roommate accidentally whacked her laptop into my lower mouth. I looked inside and my gum was bleeding. The gum below my bottom front tooth was cut away. It's been about a week and a half and it hasn't healed. I read that gums don't heal and that if the root was showing it could lead to serious problems. I am away at school and am not able to get to my dentist so I was hoping someone here could help me figure out how serious this is. I've posted a picture. Thanks!