Lump under chin

Hi all,

i had a doctors appointment today for a lump that is just under my chin, it is rock solid and you can't move it, the doctor has refered me to head and neck which they would contact me within 2 weeks. I am just wondering if anybody else has had something similar and what the outcome was? I'm worried sick as my mum and grandma both passed away of cancer 3 weeks apart! I don't even know what head and neck is! Any info would be appreciated x