question: im a 21 year old female and i have no medical problems, but i have had this hard lump in my neck for  2 months already and it did not grow any bigger or even get any smaller, but when i touch it it feels like it is bruised,no fever or any other sickness but i do feel like i have mucus stuck in my throat i also smoke 10 cigarretes to a pack a day. should i be worried? could it be cancer?