I would get your lump checked out asap, as we have learnt through my mother that early diagnois with cancer is the best thing to do. If you do have cancer of the jaw, read my mothers story, on a link below, under the heading 'I have good news for you all , stay strong'. She had stage 4 cancer and is still going strong, so rather than worry just yet, just get yourself checked asap, as it really makes a difference to your treatment if it is caught early, best wishes su