Sheri, I have practiced in dentistry for over 25 years. What you have appears to be a fibroma. This is often a benign lump that can come on from trauma, bite or for no apparent reason at all. Typically they resolve on there own in a few weeks or less. Some can last months. I checked you web profile and I see you do smoke or drink, so I feel you are at very minimal risk for this to be oral cancer. I see you are checking you sight even few minutes so I am answering this because I have to leave and you appear very anxious. If you have any other questions, I will return 5pm EST.