Lump in breasr and sore collarbone.

Hi,

Im waiting on appointment  to check a breast lump. My collarbone has been sore for a while. Its like a dragging aching sensation.I checked and im pretty sure the lymph node is swollen. I can feel a rubbery ball. Of course I'm being paranoid now. My appointment  is Wednesday. 

Has anyone had swollen lymph node in this area and can it make the collarbone sore?

Thanks so much