Lump Im My Lower Lip ,,,

About 5 months ago ,,i got into a fight when I was out ,,on the town ,,my lower lip was very badly damaged very badly swollen ,,ie ,,,then just the other month I went surfing ,and by the wind the borad hit me in the same place ,,lower ;ip ,i have since then developed a small lump in the lower lip ,,feels like a littile ball ,,not ,massive ,,but I can feel it ,,,,since then I went to the doctors ,,which she had a good look at it ,,and she said it looked nothing serious ,,,,as a secound ,a tempt I went to my denstist and looked at it ,,under massive light ,,his concluision ,,was that it could be 2 things scare tissue ie ,,or a mucouse lump ,,,has any 1 else ever has this ,,sort of thing ,,,and if so ,,could you give a reply ,,,,ive worried my self sick ,,over ,,it ,,still worried it could be somit bad ,,ie ,,cancer ,,thanks shaun ,,,