Shirlock3, you are getting good advice here. First thing tomorrow morning, open the phone book and start calling ENTs until you can get an appointment soon. When you call, tell them you have a bump on your lower lip that did not respond to antibiotics, and that you are worried it may be oral cancer. That will get their attention. Then you can know one way or another before you wear yourself out worrying. It may well be nothing, but if it is cancer, you want to get to treatment as soon as possible. Time matters here! And please accept my hearty congratulations for not smoking any more. That was one very smart move on your part.