lump on abdominal wall

Hey guys I was wondering if anybody could help me out with this. Ive had a lump on my abdominal wall for a few months now(that I know of). Its less than an inch below my rib cage, on the outside of my abs. Its right where they meet my obliques. It's pretty small, less than pea size, and hasent increased in size since I noticed it. Ive had it assessed once and was told not to worry about it. I also just got off the nurse hotline and they said not to worry. Ive been looking into it and found it could be cancer, hernia, lymph nodes.

Anyways to sum up Im going to goto the doc tomorrow, but if anybody has any idea what it might be I would appreciate it cause I might have to ask to be get tested for it if they brush me off again.

Thanks