Four nights ago I discovered a small and hard pea sized lump inside my left cheek. It's located on the jaw line towards the back and I can move it about in a small area. It wasn't hurting at first but since I've prodding it (not a good thing to do I guess) it's become a little sensitive in the area. Being someone who suffers with anxiety I am worried that it may be cancer. Any help or advice would be greatly appreciated.