I woke Sunday morning with discomfort on my left collar bone. I feel a lump about the size of a large marble that moves when I push on it. I feel pressure going up my neck as well. The soonest dr. appt. I can get is next Friday. Should I look for anything specific that may be more alarming and require sooner medical attention? I am a 51 yr old female in generally good health. My sister just completed treatment for breast cancer so I'm a bit anxious.