Earlier today, I noticed a sensitivity at my rt underarm. It is now a few hours later and the sensation has increased and I feel a lump. I am not sure if nausea has anything to do with it. Maybe it was too much birthday cake. Now, I am completely freaked out...because when I type underarm lump pain into my search engine...breast cancer comes up. Could I possibly have breast cancer? I have also had a very bad cold that I can not shake, could this be in relation?